diff --git a/composer.json b/composer.json
index 5d6590ada3..73f514cc0f 100755
--- a/composer.json
+++ b/composer.json
@@ -28,7 +28,7 @@
             "public/main/gradebook/lib",
             "public/main/lp",
             "public/main/inc/lib",
-            "plugin",
+            "public/plugin",
             "public/main/install",
             "public/main/survey"
         ]
diff --git a/config/packages/twig.yaml b/config/packages/twig.yaml
index 9ac663e96a..bd85f11726 100644
--- a/config/packages/twig.yaml
+++ b/config/packages/twig.yaml
@@ -1,6 +1,6 @@
 twig:
     debug: '%kernel.debug%'
-    paths: ['%kernel.project_dir%/templates', '%kernel.project_dir%/public/main/template/', '%kernel.project_dir%/plugin/']
+    paths: ['%kernel.project_dir%/templates', '%kernel.project_dir%/public/main/template/', '%kernel.project_dir%/public/plugin/']
     form_themes:
         - 'bootstrap_4_layout.html.twig'
         - '@SonataFormatter/Form/formatter.html.twig'
diff --git a/public/main/admin/settings.lib.php b/public/main/admin/settings.lib.php
index 7aae21ea93..281450fe88 100644
--- a/public/main/admin/settings.lib.php
+++ b/public/main/admin/settings.lib.php
@@ -16,7 +16,7 @@ use Symfony\Component\Filesystem\Filesystem;
  *
  * @package chamilo.admin
  */
-define('CSS_UPLOAD_PATH', api_get_path(SYS_APP_PATH).'Resources/public/css/themes/');
+define('CSS_UPLOAD_PATH', api_get_path(SYS_PATH).'Resources/public/css/themes/');
 
 /**
  * This function allows easy activating and inactivating of regions.
diff --git a/public/main/auth/courses_controller.php b/public/main/auth/courses_controller.php
index 71565d114d..d9b959d10b 100644
--- a/public/main/auth/courses_controller.php
+++ b/public/main/auth/courses_controller.php
@@ -30,7 +30,6 @@ class CoursesController
     public function __construct()
     {
         $this->toolname = 'auth';
-        //$actived_theme_path = api_get_template();
         $this->view = new View($this->toolname);
         $this->model = new Auth();
     }
diff --git a/public/main/inc/global.inc.php b/public/main/inc/global.inc.php
index 207259fccc..143c914e30 100644
--- a/public/main/inc/global.inc.php
+++ b/public/main/inc/global.inc.php
@@ -56,7 +56,7 @@ try {
         echo 'Cannot load current URL';
         exit;
     }
-    $newBaseUrl = substr($currentBaseUrl, 0, $pos -1);
+    $newBaseUrl = substr($currentBaseUrl, 0, $pos - 1);
     $request->setBaseUrl($newBaseUrl);
     $context->setBaseUrl($newBaseUrl);
 
diff --git a/public/main/inc/lib/api.lib.php b/public/main/inc/lib/api.lib.php
index a0a1e4a98f..5f9d5f660b 100644
--- a/public/main/inc/lib/api.lib.php
+++ b/public/main/inc/lib/api.lib.php
@@ -314,13 +314,11 @@ define('REL_HOME_PATH', 'REL_HOME_PATH');
 // Constants for api_get_path() and api_get_path_type(), etc. - registered path types.
 define('WEB_PATH', 'WEB_PATH');
 define('SYS_PATH', 'SYS_PATH');
-define('SYS_APP_PATH', 'SYS_APP_PATH');
 define('SYS_UPLOAD_PATH', 'SYS_UPLOAD_PATH');
 define('WEB_UPLOAD_PATH', 'WEB_UPLOAD_PATH');
 
 define('REL_PATH', 'REL_PATH');
 define('WEB_COURSE_PATH', 'WEB_COURSE_PATH');
-define('SYS_COURSE_PATH', 'SYS_COURSE_PATH');
 define('WEB_CODE_PATH', 'WEB_CODE_PATH');
 define('SYS_CODE_PATH', 'SYS_CODE_PATH');
 define('SYS_LANG_PATH', 'SYS_LANG_PATH');
@@ -333,14 +331,12 @@ define('WEB_PLUGIN_PATH', 'WEB_PLUGIN_PATH');
 define('WEB_PLUGIN_ASSET_PATH', 'WEB_PLUGIN_ASSET_PATH');
 define('SYS_ARCHIVE_PATH', 'SYS_ARCHIVE_PATH');
 define('WEB_ARCHIVE_PATH', 'WEB_ARCHIVE_PATH');
-define('SYS_INC_PATH', 'SYS_INC_PATH');
 define('LIBRARY_PATH', 'LIBRARY_PATH');
 define('CONFIGURATION_PATH', 'CONFIGURATION_PATH');
 define('WEB_LIBRARY_PATH', 'WEB_LIBRARY_PATH');
 define('WEB_LIBRARY_JS_PATH', 'WEB_LIBRARY_JS_PATH');
 define('WEB_AJAX_PATH', 'WEB_AJAX_PATH');
 define('SYS_TEST_PATH', 'SYS_TEST_PATH');
-define('WEB_TEMPLATE_PATH', 'WEB_TEMPLATE_PATH');
 define('SYS_TEMPLATE_PATH', 'SYS_TEMPLATE_PATH');
 define('SYS_PUBLIC_PATH', 'SYS_PUBLIC_PATH');
 define('SYS_FONTS_PATH', 'SYS_FONTS_PATH');
@@ -727,9 +723,7 @@ function api_get_path($path = '', $configuration = [])
         $emptyConfigurationParam = true;
     }
 
-    $course_folder = 'courses/';
-    $code_folder = 'public/main/';
-    $root_sys = Container::getRootDir();
+    $root_sys = Container::getProjectDir();
     $root_web = '';
     // If no $root_web has been set so far *and* no custom config has been passed to the function
     // then re-use the previously-calculated (run-specific) $root_web and skip this complex calculation
@@ -788,143 +782,105 @@ function api_get_path($path = '', $configuration = [])
         }
     }
 
-    $paths = [];
-    // Initialise cache with default values.
-    if (!array_key_exists($root_web, $paths)) {
-        $paths[$root_web] = [
-            WEB_PATH => '',
-            SYS_PATH => 'public/',
-            REL_PATH => '',
-            WEB_COURSE_PATH => '',
-            SYS_COURSE_PATH => '',
-            REL_COURSE_PATH => '',
-            WEB_CODE_PATH => '/main/',
-            SYS_CODE_PATH => 'public/main/',
-            REL_CODE_PATH => '/main/',
-            SYS_LANG_PATH => 'lang/',
-            WEB_IMG_PATH => 'img/',
-            WEB_CSS_PATH => 'build/css/',
-            SYS_CSS_PATH => 'build/css/',
-            SYS_PLUGIN_PATH => 'plugin/',
-            WEB_PLUGIN_PATH => 'plugin/',
-            WEB_PLUGIN_ASSET_PATH => 'public/plugins/',
-            SYS_ARCHIVE_PATH => 'var/cache/',
-            WEB_ARCHIVE_PATH => 'var/cache/',
-            SYS_APP_PATH => 'var/',
-            SYS_UPLOAD_PATH => 'var/upload/',
-            SYS_INC_PATH => 'inc/',
-            CONFIGURATION_PATH => 'app/config/',
-            LIBRARY_PATH => 'inc/lib/',
-            WEB_LIBRARY_PATH => 'inc/lib/',
-            WEB_LIBRARY_JS_PATH => 'inc/lib/javascript/',
-            WEB_AJAX_PATH => 'inc/ajax/',
-            SYS_TEST_PATH => 'tests/',
-            WEB_TEMPLATE_PATH => 'template/',
-            SYS_TEMPLATE_PATH => 'template/',
-            //WEB_UPLOAD_PATH => 'var/upload/',
-            WEB_PUBLIC_PATH => '/',
-            SYS_PUBLIC_PATH => 'public/',
-            SYS_FONTS_PATH => 'fonts/',
-        ];
-    }
+    $paths = [
+        WEB_PATH => $root_web,
+        SYS_PATH => $root_sys.'public/',
+        REL_PATH => '',
+        CONFIGURATION_PATH => 'app/config/',
+        LIBRARY_PATH => 'inc/lib/',
+
+        REL_COURSE_PATH => '',
+        REL_CODE_PATH => '/main/',
+
+        SYS_CODE_PATH => $root_sys.'public/main/',
+        SYS_CSS_PATH => $root_sys.'public/build/css/',
+        SYS_PLUGIN_PATH => $root_sys.'public/plugin/',
+        SYS_ARCHIVE_PATH => $root_sys.'var/cache/',
+        SYS_UPLOAD_PATH => 'var/upload/',
+        SYS_TEST_PATH => 'tests/',
+        SYS_TEMPLATE_PATH => $root_sys.'template/',
+        SYS_PUBLIC_PATH => $root_sys.'public/',
+        SYS_FONTS_PATH => $root_sys.'public/fonts/',
+
+        WEB_CODE_PATH => $root_web.'main/',
+        WEB_PLUGIN_ASSET_PATH => $root_web.'plugins/',
+        WEB_COURSE_PATH => $root_web.'courses/',
+        WEB_IMG_PATH => $root_web.'img/',
+        WEB_CSS_PATH => $root_web.'build/css/',
+        WEB_AJAX_PATH => $root_web.'main/inc/ajax/',
+        WEB_LIBRARY_PATH => $root_web.'inc/lib/',
+        WEB_LIBRARY_JS_PATH => $root_web.'inc/lib/javascript/',
+        WEB_PLUGIN_PATH => $root_web.'plugin/',
+        WEB_ARCHIVE_PATH => 'var/cache/',
+        //WEB_UPLOAD_PATH => 'var/upload/',
+        WEB_PUBLIC_PATH => $root_web,
+    ];
 
-    $isInitialized = [];
     $root_rel = '';
 
-    if (!empty($root_rel)) {
-        // Adds "/" to the root_rel
-        $hasSlash = substr($root_rel, 0, 1);
-        if ($hasSlash !== '/') {
-            $root_rel = '/'.$root_rel;
-        }
-    }
-
-    // Web server base and system server base.
-    if (!array_key_exists($root_web, $isInitialized)) {
-        // Dealing with trailing slashes.
-        $rootWebWithSlash = api_add_trailing_slash($root_web);
-        $root_sys = api_add_trailing_slash($root_sys);
-        $root_rel = api_add_trailing_slash($root_rel);
-
-        // Initialization of a table that contains common-purpose paths.
-        $paths[$root_web][REL_PATH] = $root_rel;
-        $paths[$root_web][REL_CODE_PATH] = $root_rel.$code_folder;
-        $paths[$root_web][WEB_PATH] = $rootWebWithSlash;
-        $paths[$root_web][WEB_CODE_PATH] = $rootWebWithSlash.'main/';
-        $paths[$root_web][WEB_COURSE_PATH] = $rootWebWithSlash.$course_folder;
-        $paths[$root_web][WEB_PLUGIN_PATH] = $rootWebWithSlash.$paths[$root_web][WEB_PLUGIN_PATH];
-        $paths[$root_web][WEB_PLUGIN_ASSET_PATH] = $rootWebWithSlash.$paths[$root_web][WEB_PLUGIN_ASSET_PATH];
-        $paths[$root_web][WEB_ARCHIVE_PATH] = $rootWebWithSlash.$paths[$root_web][WEB_ARCHIVE_PATH];
-        $paths[$root_web][WEB_CSS_PATH] = $rootWebWithSlash.$paths[$root_web][WEB_CSS_PATH];
-        //$paths[$root_web][WEB_UPLOAD_PATH] = $rootWebWithSlash.$paths[$root_web][WEB_UPLOAD_PATH];
-        $paths[$root_web][WEB_PUBLIC_PATH] = $rootWebWithSlash;
-
-        $paths[$root_web][WEB_IMG_PATH] = $rootWebWithSlash.$paths[$root_web][WEB_IMG_PATH];
-        $paths[$root_web][WEB_LIBRARY_PATH] = $paths[$root_web][WEB_CODE_PATH].$paths[$root_web][WEB_LIBRARY_PATH];
-        $paths[$root_web][WEB_LIBRARY_JS_PATH] = $paths[$root_web][WEB_CODE_PATH].$paths[$root_web][WEB_LIBRARY_JS_PATH];
-        $paths[$root_web][WEB_AJAX_PATH] = $paths[$root_web][WEB_CODE_PATH].$paths[$root_web][WEB_AJAX_PATH];
-        $paths[$root_web][WEB_TEMPLATE_PATH] = $paths[$root_web][WEB_CODE_PATH].$paths[$root_web][WEB_TEMPLATE_PATH];
-
-        $paths[$root_web][SYS_PATH] = $root_sys;
-        $paths[$root_web][SYS_CODE_PATH] = $root_sys.$code_folder;
-        $paths[$root_web][SYS_TEST_PATH] = $paths[$root_web][SYS_PATH].$paths[$root_web][SYS_TEST_PATH];
-        $paths[$root_web][SYS_TEMPLATE_PATH] = $paths[$root_web][SYS_CODE_PATH].$paths[$root_web][SYS_TEMPLATE_PATH];
-        $paths[$root_web][SYS_PUBLIC_PATH] = $paths[$root_web][SYS_PATH].$paths[$root_web][SYS_PUBLIC_PATH];
-        $paths[$root_web][SYS_CSS_PATH] = $paths[$root_web][SYS_PATH].$paths[$root_web][SYS_CSS_PATH];
-        $paths[$root_web][SYS_FONTS_PATH] = $paths[$root_web][SYS_CODE_PATH].$paths[$root_web][SYS_FONTS_PATH];
-        $paths[$root_web][SYS_ARCHIVE_PATH] = $paths[$root_web][SYS_PATH].$paths[$root_web][SYS_ARCHIVE_PATH];
-        $paths[$root_web][SYS_APP_PATH] = $paths[$root_web][SYS_PATH].$paths[$root_web][SYS_APP_PATH];
-        $paths[$root_web][SYS_UPLOAD_PATH] = $paths[$root_web][SYS_PATH].$paths[$root_web][SYS_UPLOAD_PATH];
-        $paths[$root_web][SYS_LANG_PATH] = $paths[$root_web][SYS_CODE_PATH].$paths[$root_web][SYS_LANG_PATH];
-        $paths[$root_web][SYS_PLUGIN_PATH] = $paths[$root_web][SYS_PATH].$paths[$root_web][SYS_PLUGIN_PATH];
-        $paths[$root_web][SYS_INC_PATH] = $paths[$root_web][SYS_CODE_PATH].$paths[$root_web][SYS_INC_PATH];
-
-        $paths[$root_web][LIBRARY_PATH] = $paths[$root_web][SYS_CODE_PATH].$paths[$root_web][LIBRARY_PATH];
-        $paths[$root_web][CONFIGURATION_PATH] = $paths[$root_web][SYS_PATH].$paths[$root_web][CONFIGURATION_PATH];
-
-        global $virtualChamilo;
-        if (!empty($virtualChamilo)) {
-            $paths[$root_web][SYS_ARCHIVE_PATH] = api_add_trailing_slash($virtualChamilo[SYS_ARCHIVE_PATH]);
-            $paths[$root_web][SYS_COURSE_PATH] = api_add_trailing_slash($virtualChamilo[SYS_COURSE_PATH]);
-            $paths[$root_web][SYS_UPLOAD_PATH] = api_add_trailing_slash($virtualChamilo[SYS_UPLOAD_PATH]);
-            //$paths[$root_web][WEB_UPLOAD_PATH] = api_add_trailing_slash($virtualChamilo[WEB_UPLOAD_PATH]);
-            $paths[$root_web][WEB_ARCHIVE_PATH] = api_add_trailing_slash($virtualChamilo[WEB_ARCHIVE_PATH]);
-            //$paths[$root_web][WEB_COURSE_PATH] = api_add_trailing_slash($virtualChamilo[WEB_COURSE_PATH]);
-
-            // WEB_UPLOAD_PATH should be handle by apache htaccess in the vhost
-
-            // RewriteEngine On
-            // RewriteRule /app/upload/(.*)$ http://localhost/other/upload/my-chamilo111-net/$1 [QSA,L]
-
-            //$paths[$root_web][WEB_UPLOAD_PATH] = api_add_trailing_slash($virtualChamilo[WEB_UPLOAD_PATH]);
-            //$paths[$root_web][REL_PATH] = $virtualChamilo[REL_PATH];
-            //$paths[$root_web][REL_COURSE_PATH] = $virtualChamilo[REL_COURSE_PATH];
-        }
-
-        $isInitialized[$root_web] = true;
+    // Dealing with trailing slashes.
+    $rootWebWithSlash = api_add_trailing_slash($root_web);
+    $root_sys = api_add_trailing_slash($root_sys);
+    $root_rel = api_add_trailing_slash($root_rel);
+
+    // Initialization of a table that contains common-purpose paths.
+    /*$paths[$root_web][REL_PATH] = $root_rel;
+    $paths[$root_web][REL_CODE_PATH] = $root_rel.$code_folder;
+    $paths[$root_web][WEB_PATH] = $rootWebWithSlash;
+    $paths[$root_web][WEB_CODE_PATH] = $rootWebWithSlash.'main/';
+    $paths[$root_web][WEB_COURSE_PATH] = $rootWebWithSlash.$course_folder;
+    $paths[$root_web][WEB_PLUGIN_PATH] = $rootWebWithSlash.$paths[$root_web][WEB_PLUGIN_PATH];
+    $paths[$root_web][WEB_PLUGIN_ASSET_PATH] = $rootWebWithSlash.$paths[$root_web][WEB_PLUGIN_ASSET_PATH];
+    $paths[$root_web][WEB_ARCHIVE_PATH] = $rootWebWithSlash.$paths[$root_web][WEB_ARCHIVE_PATH];
+    $paths[$root_web][WEB_CSS_PATH] = $rootWebWithSlash.$paths[$root_web][WEB_CSS_PATH];
+    //$paths[$root_web][WEB_UPLOAD_PATH] = $rootWebWithSlash.$paths[$root_web][WEB_UPLOAD_PATH];
+    $paths[$root_web][WEB_PUBLIC_PATH] = $rootWebWithSlash;
+
+    $paths[$root_web][WEB_IMG_PATH] = $rootWebWithSlash.$paths[$root_web][WEB_IMG_PATH];
+    $paths[$root_web][WEB_LIBRARY_PATH] = $paths[$root_web][WEB_CODE_PATH].$paths[$root_web][WEB_LIBRARY_PATH];
+    $paths[$root_web][WEB_LIBRARY_JS_PATH] = $paths[$root_web][WEB_CODE_PATH].$paths[$root_web][WEB_LIBRARY_JS_PATH];
+    $paths[$root_web][WEB_AJAX_PATH] = $paths[$root_web][WEB_CODE_PATH].$paths[$root_web][WEB_AJAX_PATH];
+
+    $paths[$root_web][SYS_PATH] = $root_sys;
+    $paths[$root_web][SYS_CODE_PATH] = $root_sys.$code_folder;
+    $paths[$root_web][SYS_TEST_PATH] = $paths[$root_web][SYS_PATH].$paths[$root_web][SYS_TEST_PATH];
+    $paths[$root_web][SYS_TEMPLATE_PATH] = $paths[$root_web][SYS_CODE_PATH].$paths[$root_web][SYS_TEMPLATE_PATH];
+    $paths[$root_web][SYS_PUBLIC_PATH] = $paths[$root_web][SYS_PATH].$paths[$root_web][SYS_PUBLIC_PATH];
+    $paths[$root_web][SYS_CSS_PATH] = $paths[$root_web][SYS_PATH].$paths[$root_web][SYS_CSS_PATH];
+    $paths[$root_web][SYS_FONTS_PATH] = $paths[$root_web][SYS_CODE_PATH].$paths[$root_web][SYS_FONTS_PATH];
+    $paths[$root_web][SYS_ARCHIVE_PATH] = $paths[$root_web][SYS_PATH].$paths[$root_web][SYS_ARCHIVE_PATH];
+    $paths[$root_web][SYS_APP_PATH] = $paths[$root_web][SYS_PATH].$paths[$root_web][SYS_APP_PATH];
+    $paths[$root_web][SYS_UPLOAD_PATH] = $paths[$root_web][SYS_PATH].$paths[$root_web][SYS_UPLOAD_PATH];
+    $paths[$root_web][SYS_PLUGIN_PATH] = $paths[$root_web][SYS_PATH].$paths[$root_web][SYS_PLUGIN_PATH];
+    $paths[$root_web][LIBRARY_PATH] = $paths[$root_web][SYS_CODE_PATH].$paths[$root_web][LIBRARY_PATH];
+    $paths[$root_web][CONFIGURATION_PATH] = $paths[$root_web][SYS_PATH].$paths[$root_web][CONFIGURATION_PATH];*/
+
+    global $virtualChamilo;
+    if (!empty($virtualChamilo)) {
+        $paths[SYS_ARCHIVE_PATH] = api_add_trailing_slash($virtualChamilo[SYS_ARCHIVE_PATH]);
+        $paths[SYS_UPLOAD_PATH] = api_add_trailing_slash($virtualChamilo[SYS_UPLOAD_PATH]);
+        //$paths[$root_web][WEB_UPLOAD_PATH] = api_add_trailing_slash($virtualChamilo[WEB_UPLOAD_PATH]);
+        $paths[WEB_ARCHIVE_PATH] = api_add_trailing_slash($virtualChamilo[WEB_ARCHIVE_PATH]);
+        //$paths[$root_web][WEB_COURSE_PATH] = api_add_trailing_slash($virtualChamilo[WEB_COURSE_PATH]);
+
+        // WEB_UPLOAD_PATH should be handle by apache htaccess in the vhost
+
+        // RewriteEngine On
+        // RewriteRule /app/upload/(.*)$ http://localhost/other/upload/my-chamilo111-net/$1 [QSA,L]
+
+        //$paths[$root_web][WEB_UPLOAD_PATH] = api_add_trailing_slash($virtualChamilo[WEB_UPLOAD_PATH]);
+        //$paths[$root_web][REL_PATH] = $virtualChamilo[REL_PATH];
+        //$paths[$root_web][REL_COURSE_PATH] = $virtualChamilo[REL_COURSE_PATH];
     }
 
     $path = trim($path);
 
     // Retrieving a common-purpose path.
-    if (isset($paths[$root_web][$path])) {
-        return $paths[$root_web][$path];
-    }
-
-    // Second purification.
-
-    // Replacing Windows back slashes.
-    $path = str_replace('\\', '/', $path);
-    // Query strings sometimes mighth wrongly appear in non-URLs.
-    // Let us check remove them from all types of paths.
-    if (($pos = strpos($path, '?')) !== false) {
-        $path = substr($path, 0, $pos);
+    if (isset($paths[$path])) {
+        return $paths[$path];
     }
 
-    // Path now is semi-absolute. It is convenient at this moment repeated slashes to be removed.
-    $path = preg_replace(REPEATED_SLASHES_PURIFIER, '/', $path);
-
-    return $path;
+    return false;
 }
 
 /**
@@ -2198,7 +2154,6 @@ function api_format_course_array(Course $course)
     $courseData['legal'] = $course->getLegal();
     $courseData['show_score'] = $course->getShowScore(); //used in the work tool
 
-    //$courseSys = api_get_path(SYS_COURSE_PATH).$course_data['directory'];
     $webCourseHome = api_get_path(WEB_COURSE_PATH).$courseData['code'];
 
     // Course password
@@ -6864,34 +6819,6 @@ function api_protect_global_admin_script()
     return true;
 }
 
-/**
- * Get active template.
- *
- * @param string    theme type (optional: default)
- * @param string    path absolute(abs) or relative(rel) (optional:rel)
- *
- * @return string actived template path
- */
-function api_get_template($path_type = 'rel')
-{
-    $path_types = ['rel', 'abs'];
-    $template_path = '';
-    if (in_array($path_type, $path_types)) {
-        if ($path_type == 'rel') {
-            $template_path = api_get_path(SYS_TEMPLATE_PATH);
-        } else {
-            $template_path = api_get_path(WEB_TEMPLATE_PATH);
-        }
-    }
-    $actived_theme = 'default';
-    if (api_get_setting('active_template')) {
-        $actived_theme = api_get_setting('active_template');
-    }
-    $actived_theme_path = $template_path.$actived_theme.DIRECTORY_SEPARATOR;
-
-    return $actived_theme_path;
-}
-
 /**
  * Check browser support for specific file types or features
  * This function checks if the user's browser supports a file format or given
diff --git a/public/main/inc/lib/chamilo_session.class.php b/public/main/inc/lib/chamilo_session.class.php
index a364ef4c70..6e79f97a0c 100644
--- a/public/main/inc/lib/chamilo_session.class.php
+++ b/public/main/inc/lib/chamilo_session.class.php
@@ -59,7 +59,7 @@ class ChamiloSession implements \ArrayAccess
         $session = Container::getSession();
 
         $result = null;
-        if (isset($session)) {
+        if (isset($session) && $session) {
             $result = $session->get($variable);
         }
 
diff --git a/public/main/inc/lib/diagnoser.lib.php b/public/main/inc/lib/diagnoser.lib.php
index b5b4764737..5e83648f13 100644
--- a/public/main/inc/lib/diagnoser.lib.php
+++ b/public/main/inc/lib/diagnoser.lib.php
@@ -145,9 +145,8 @@ class Diagnoser
     {
         $array = [];
         $writable_folders = [
-            api_get_path(SYS_APP_PATH).'cache',
-            api_get_path(SYS_COURSE_PATH),
-            api_get_path(SYS_APP_PATH).'upload/users/',
+            api_get_path(SYS_ARCHIVE_PATH).'cache',
+            api_get_path(SYS_PATH).'upload/users/',
         ];
         foreach ($writable_folders as $index => $folder) {
             $writable = is_writable($folder);
diff --git a/public/main/inc/lib/display.lib.php b/public/main/inc/lib/display.lib.php
index 549eb790ce..e5786288ac 100644
--- a/public/main/inc/lib/display.lib.php
+++ b/public/main/inc/lib/display.lib.php
@@ -770,7 +770,7 @@ class Display
         $image = trim($image);
 
         if (isset($size)) {
-            $size = intval($size);
+            $size = (int) $size;
         } else {
             $size = ICON_SIZE_SMALL;
         }
diff --git a/public/main/inc/lib/pdf.lib.php b/public/main/inc/lib/pdf.lib.php
index 3235970b0a..b66c27c760 100644
--- a/public/main/inc/lib/pdf.lib.php
+++ b/public/main/inc/lib/pdf.lib.php
@@ -387,7 +387,7 @@ class PDF
         $addDefaultCss = false,
         $completeHeader = true
     ) {
-        $urlAppend = api_get_configuration_value('url_append');
+        $urlAppend = '';
 
         if (empty($document_html)) {
             return false;
diff --git a/public/main/inc/lib/template.lib.php b/public/main/inc/lib/template.lib.php
index d3cd495bfc..0e780cd7f3 100644
--- a/public/main/inc/lib/template.lib.php
+++ b/public/main/inc/lib/template.lib.php
@@ -1557,7 +1557,7 @@ class Template
         }
 
         if (api_is_multiple_url_enabled()) {
-            $access_url_id = api_get_current_access_url_id();
+            /*$access_url_id = api_get_current_access_url_id();
             if ($access_url_id != -1) {
                 $url_info = api_get_access_url($access_url_id);
                 $url = api_remove_trailing_slash(
@@ -1572,7 +1572,7 @@ class Template
                 if (is_file($icon_real_homep.'favicon.ico')) {
                     $favico = '<link rel="shortcut icon" href="'.$homep.'favicon.ico" type="image/x-icon" />';
                 }
-            }
+            }*/
         }
 
         $this->assign('favico', $favico);
diff --git a/public/main/lp/learnpath.class.php b/public/main/lp/learnpath.class.php
index d42b6bc6dc..2c69e3d47f 100644
--- a/public/main/lp/learnpath.class.php
+++ b/public/main/lp/learnpath.class.php
@@ -6826,7 +6826,7 @@ class learnpath
     public function edit_document($_course)
     {
         $course_id = api_get_course_int_id();
-        $urlAppend = api_get_configuration_value('url_append');
+        $urlAppend = '';
         // Please, do not modify this dirname formatting.
         $postDir = isset($_POST['dir']) ? $_POST['dir'] : '';
         $dir = isset($_GET['dir']) ? $_GET['dir'] : $postDir;
diff --git a/src/CoreBundle/Menu/LeftMenuBuilder.php b/src/CoreBundle/Menu/LeftMenuBuilder.php
index df6a7ef591..5f3f98694a 100644
--- a/src/CoreBundle/Menu/LeftMenuBuilder.php
+++ b/src/CoreBundle/Menu/LeftMenuBuilder.php
@@ -179,7 +179,7 @@ class LeftMenuBuilder implements ContainerAwareInterface
                 ]
             );
 
-            $menu->addChild(
+            /*$menu->addChild(
                 $translator->trans('My files'),
                 [
                     'route' => 'legacy_main',
@@ -187,7 +187,7 @@ class LeftMenuBuilder implements ContainerAwareInterface
                         'name' => 'social/myfiles.php',
                     ],
                 ]
-            );
+            );*/
 
             $menu->addChild(
                 $translator->trans('Edit profile'),
@@ -304,7 +304,7 @@ class LeftMenuBuilder implements ContainerAwareInterface
                 ]
             );
 
-            $menu->addChild(
+            /*$menu->addChild(
                 $translator->trans('My files'),
                 [
                     'route' => 'legacy_main',
@@ -312,7 +312,7 @@ class LeftMenuBuilder implements ContainerAwareInterface
                         'name' => 'social/myfiles.php',
                     ],
                 ]
-            );
+            );*/
         }
 
         return $menu;
diff --git a/src/CoreBundle/Menu/NavBuilder.php b/src/CoreBundle/Menu/NavBuilder.php
index da2949343a..0f14683ffc 100644
--- a/src/CoreBundle/Menu/NavBuilder.php
+++ b/src/CoreBundle/Menu/NavBuilder.php
@@ -209,13 +209,13 @@ class NavBuilder implements ContainerAwareInterface
                         'routeParameters' => ['name' => 'social/groups.php'],
                     ]
                 );
-                $menu['social']->addChild(
+                /*$menu['social']->addChild(
                     $translator->trans('My Files'),
                     [
                         'route' => 'legacy_main',
                         'routeParameters' => ['name' => 'social/myfiles.php'],
                     ]
-                );
+                );*/
             }
 
             if ($checker->isGranted('ROLE_ADMIN')) {