diff --git a/public/main/inc/lib/display.lib.php b/public/main/inc/lib/display.lib.php
index c74a282bf8..84db9dae55 100644
--- a/public/main/inc/lib/display.lib.php
+++ b/public/main/inc/lib/display.lib.php
@@ -841,12 +841,6 @@ class Display
         $filterPath = true
     ) {
         if (empty($image_path)) {
-            // For some reason, the call to img() happened without a proper
-            // image. Log the error and return an empty string to avoid
-            // breaking the HTML
-            $trace = debug_backtrace();
-            $caller = $trace[1];
-            //error_log('No image provided in Display::img(). Caller info: '.print_r($caller, 1));
             return '';
         }
         // Sanitizing the parameter $image_path
@@ -2830,8 +2824,9 @@ HTML;
         }
 
         $lpJs = api_get_path(WEB_PUBLIC_PATH).'build/lp.js';
-        //{type:"script", src:"'.api_get_jquery_ui_js_web_path().'"},
-        //{type:"script", src: "'.$webPublicPath.'build/libs/mediaelement/plugins/markersrolls/markersrolls.js"},
+        // {type:"script", src:"'.api_get_jquery_ui_js_web_path().'"},
+        // {type:"script", src: "'.$webPublicPath.'build/libs/mediaelement/plugins/markersrolls/markersrolls.js"},
+        // {type:"script", src:"'.$webPublicPath.'build/libs/mathjax/MathJax.js?config=AM_HTMLorMML"},
         $videoFeatures = implode("','", $videoFeatures);
         $frameReady = '
         $.frameReady(function() {
@@ -2860,8 +2855,6 @@ HTML;
             '.$translateHtml.'
             ]},
             '.$videoPluginCssFiles.'
-            {type:"script", src:"'.$webPublicPath.'build/libs/mathjax/MathJax.js?config=AM_HTMLorMML"},
-
         ]);';
 
         return $frameReady;
diff --git a/public/main/lp/learnpath.class.php b/public/main/lp/learnpath.class.php
index 58278ce73a..136c700c4e 100644
--- a/public/main/lp/learnpath.class.php
+++ b/public/main/lp/learnpath.class.php
@@ -6371,7 +6371,7 @@ class learnpath
         }
 
         if ($allowExpand) {
-            $actionsLeft .= Display::url(
+            /*$actionsLeft .= Display::url(
                 Display::return_icon(
                     'expand.png',
                     get_lang('Expand'),
@@ -6386,7 +6386,7 @@ class learnpath
                 ),
                 '#',
                 ['role' => 'button', 'id' => 'hide_bar_template']
-            );
+            );*/
         }
 
         if ($showRequirementButtons) {
diff --git a/public/main/lp/lp_edit.php b/public/main/lp/lp_edit.php
index eab95095ac..7baf83eab9 100644
--- a/public/main/lp/lp_edit.php
+++ b/public/main/lp/lp_edit.php
@@ -3,6 +3,7 @@
 /* For licensing terms, see /license.txt */
 
 use Chamilo\CoreBundle\Framework\Container;
+use Chamilo\CourseBundle\Entity\CLp;
 use ChamiloSession as Session;
 
 /**
@@ -24,7 +25,7 @@ if (empty($lpId)) {
 }
 $lpId = (int) $lpId;
 
-/** @var \Chamilo\CourseBundle\Entity\CLp $lp */
+/** @var CLp $lp */
 $lp = $lpRepo->find($lpId);
 
 $nameTools = get_lang('Document');
@@ -172,7 +173,7 @@ $expired_on = $learnPath->expired_on;
 $publicated_on = $learnPath->publicated_on;
 
 // Prerequisites
-$form->addElement('html', '<div class="form-group">');
+$form->addElement('html', '<div class="row form-group ">');
 $items = $learnPath->display_lp_prerequisites_list();
 $form->addElement('html', '<label class="col-md-2">'.get_lang('Prerequisites').'</label>');
 $form->addElement('html', '<div class="col-md-8">');
diff --git a/public/main/lp/lp_subscribe_users.php b/public/main/lp/lp_subscribe_users.php
index 702591471f..c87d5b254c 100644
--- a/public/main/lp/lp_subscribe_users.php
+++ b/public/main/lp/lp_subscribe_users.php
@@ -51,7 +51,6 @@ $courseCode = api_get_course_id();
 $sessionId = api_get_session_id();
 
 $url = api_get_self().'?'.api_get_cidreq().'&lp_id='.$lpId;
-$lp = new learnpath($courseCode, $lpId, api_get_user_id());
 $em = Database::getManager();
 $courseRepo = Container::getCourseRepository();
 
diff --git a/public/main/lp/lp_view.php b/public/main/lp/lp_view.php
index 4515ab3416..248241333e 100644
--- a/public/main/lp/lp_view.php
+++ b/public/main/lp/lp_view.php
@@ -424,7 +424,7 @@ switch ($returnLink) {
 
 $lpPreviewImagePath = Display::returnIconPath('unknown.png', ICON_SIZE_BIG);
 if ($lp->getResourceNode()->hasResourceFile()) {
-    $lpPreviewImagePath = $lpRepo->getResourceFileUrl($lp);
+    $lpPreviewImagePath = $lpRepo->getResourceFileUrl($lp).'?'.api_get_cidreq();
 }
 
 if ($oLP->current == $oLP->get_last()) {
@@ -571,15 +571,7 @@ if (!empty(api_get_configuration_value('lp_menu_location'))) {
 }
 $template->assign('menu_location', $menuLocation);
 $template->assign('disable_js_in_lp_view', (int) api_get_configuration_value('disable_js_in_lp_view'));
-$template->assign(
-    'lp_preview_image',
-    Display::img(
-        $lpPreviewImagePath,
-        $oLP->getNameNoTags(),
-        [],
-        ICON_SIZE_BIG
-    )
-);
+$template->assign('lp_preview_image', '<img src="'.$lpPreviewImagePath.'" alt="'.$oLP->getNameNoTags().'" />');
 
 $frameReady = Display::getFrameReadyBlock('#content_id, #content_id_blank');
 $template->assign('frame_ready', $frameReady);
diff --git a/public/main/template/default/auth/inscription.html.twig b/public/main/template/default/auth/inscription.html.twig
index 9b0ea6b1de..c80301ae96 100644
--- a/public/main/template/default/auth/inscription.html.twig
+++ b/public/main/template/default/auth/inscription.html.twig
@@ -7,8 +7,6 @@
 {% block content %}
     {% autoescape false %}
 
-    {{ sonata_page_render_container('content', page) }}
-
     {{ inscription_header }}
     {{ inscription_content }}
     {{ form }}
diff --git a/public/main/template/default/auth/inscription_edit.html.twig b/public/main/template/default/auth/inscription_edit.html.twig
index 08c4ea21d2..cfbb345dec 100644
--- a/public/main/template/default/auth/inscription_edit.html.twig
+++ b/public/main/template/default/auth/inscription_edit.html.twig
@@ -2,13 +2,7 @@
 
 {% block content %}
     {% autoescape false %}
-
-        <div class="well">
-            {{ sonata_page_render_container('content', page) }}
-        </div>
-
         {{ form }}
-
     {% endautoescape %}
 {% endblock %}
 
diff --git a/src/CoreBundle/Controller/ResourceController.php b/src/CoreBundle/Controller/ResourceController.php
index 014f28c003..cc5f50acd7 100644
--- a/src/CoreBundle/Controller/ResourceController.php
+++ b/src/CoreBundle/Controller/ResourceController.php
@@ -533,8 +533,7 @@ class ResourceController extends AbstractResourceController implements CourseCon
     public function viewAction(Request $request, RouterInterface $router): Response
     {
         $id = $request->get('id');
-        $filter = $request->get('filter'); // See filters definitions in /config/services.yml
-        $em = $this->getDoctrine();
+        $filter = $request->get('filter'); // See filters definitions in /config/services.yml.
         /** @var ResourceNode $resourceNode */
         $resourceNode = $this->getResourceNodeRepository()->find($id);
 
@@ -542,14 +541,6 @@ class ResourceController extends AbstractResourceController implements CourseCon
             throw new FileNotFoundException('Resource not found');
         }
 
-        /*$repo = $this->getRepositoryFromRequest($request);
-        if ($repo instanceof ResourceWithLinkInterface) {
-            $resource = $repo->getResourceFromResourceNode($resourceNode->getId());
-            $url = $repo->getLink($resource, $router, $this->getCourseUrlQueryToArray());
-
-            return $this->redirect($url);
-        }*/
-
         return $this->processFile($request, $resourceNode, 'show', $filter);
     }
 
@@ -611,7 +602,7 @@ class ResourceController extends AbstractResourceController implements CourseCon
         }
 
         $zipName = $resourceNode->getSlug().'.zip';
-        $rootNodePath = $resourceNode->getPathForDisplay();
+        //$rootNodePath = $resourceNode->getPathForDisplay();
         $resourceNodeRepo = $repo->getResourceNodeRepository();
         $type = $repo->getResourceType();
 
@@ -704,7 +695,6 @@ class ResourceController extends AbstractResourceController implements CourseCon
             $this->trans('Unauthorised view access to resource')
         );
 
-        //$repo = $this->getRepositoryFromRequest($request);
         $resourceFile = $resourceNode->getResourceFile();
 
         if (!$resourceFile) {