diff --git a/main/lp/learnpath.class.php b/main/lp/learnpath.class.php
index 7e914a02af..278df7beae 100755
--- a/main/lp/learnpath.class.php
+++ b/main/lp/learnpath.class.php
@@ -2423,10 +2423,10 @@ class learnpath
         }
 
         // @todo remove this query and load the row info as a parameter
-        $tbl_learnpath = Database::get_course_table(TABLE_LP_MAIN);
+        $table = Database::get_course_table(TABLE_LP_MAIN);
         // Get current prerequisite
         $sql = "SELECT id, prerequisite, subscribe_users, publicated_on, expired_on
-                FROM $tbl_learnpath
+                FROM $table
                 WHERE iid = $lp_id";
         $rs = Database::query($sql);
         $now = time();
@@ -13031,6 +13031,42 @@ EOD;
                 }
             }
 
+            $courseInfo = api_get_course_info();
+            foreach ($itemList['document'] as $documentId) {
+                $documentInfo = DocumentManager::get_document_data_by_id($documentId, api_get_course_id());
+                $items = DocumentManager::get_resources_from_source_html(
+                    $documentInfo['absolute_path'],
+                    true,
+                    TOOL_DOCUMENT
+                );
+
+                if (!empty($items)) {
+                    foreach ($items as $item) {
+                        // Get information about source url
+                        $url = $item[0]; // url
+                        $scope = $item[1]; // scope (local, remote)
+                        $type = $item[2]; // type (rel, abs, url)
+
+                        $origParseUrl = parse_url($url);
+                        $realOrigPath = isset($origParseUrl['path']) ? $origParseUrl['path'] : null;
+
+                        if ($scope == 'local') {
+                            if ($type == 'abs' || $type == 'rel') {
+                                $documentFile = strstr($realOrigPath, 'document');
+                                if (strpos($realOrigPath, $documentFile) !== false) {
+                                    $documentFile = str_replace('document', '', $documentFile);
+                                    $itemDocumentId = DocumentManager::get_document_id($courseInfo, $documentFile);
+                                    // Document found! Add it to the list
+                                    if ($itemDocumentId) {
+                                        $itemList['document'][] = $itemDocumentId;
+                                    }
+                                }
+                            }
+                        }
+                    }
+                }
+            }
+
             $courseBuilder->build_documents(
                 api_get_session_id(),
                 $this->get_course_int_id(),
diff --git a/main/lp/learnpathItem.class.php b/main/lp/learnpathItem.class.php
index d5460354af..5a606f4824 100755
--- a/main/lp/learnpathItem.class.php
+++ b/main/lp/learnpathItem.class.php
@@ -1046,17 +1046,15 @@ class learnpathItem
         if ($recursivity > $max) {
             return [];
         }
-        if (!isset($type)) {
-            $type = $this->get_type();
-        }
+
+        $type = empty($type) ? $this->get_type() : $type;
+
         if (!isset($abs_path)) {
             $path = $this->get_file_path();
             $abs_path = api_get_path(SYS_COURSE_PATH).api_get_course_path().'/'.$path;
         }
 
         $files_list = [];
-        $type = $this->get_type();
-
         switch ($type) {
             case TOOL_DOCUMENT:
             case TOOL_QUIZ:
diff --git a/main/lp/lp_controller.php b/main/lp/lp_controller.php
index 3fd645907f..bcef81dadd 100755
--- a/main/lp/lp_controller.php
+++ b/main/lp/lp_controller.php
@@ -860,10 +860,6 @@ switch ($action) {
         }
         break;
     case 'export_to_course_build':
-        if (!learnpath::is_lp_visible_for_student($_SESSION['oLP']->lp_id, api_get_user_id())) {
-            api_not_allowed();
-        }
-
         if (api_is_allowed_to_edit()) {
             if (!$lp_found) {
                 require 'lp_list.php';
diff --git a/src/Chamilo/CoreBundle/Component/Editor/CkEditor/CkEditor.php b/src/Chamilo/CoreBundle/Component/Editor/CkEditor/CkEditor.php
index d4d0f4e9e8..c38b0ec575 100644
--- a/src/Chamilo/CoreBundle/Component/Editor/CkEditor/CkEditor.php
+++ b/src/Chamilo/CoreBundle/Component/Editor/CkEditor/CkEditor.php
@@ -97,6 +97,8 @@ class CkEditor extends Editor
 
     /**
      * @param array $templates
+     *
+     * @return string
      */
     public function formatTemplates($templates)
     {
diff --git a/src/Chamilo/CourseBundle/Component/CourseCopy/CourseRestorer.php b/src/Chamilo/CourseBundle/Component/CourseCopy/CourseRestorer.php
index d1669a67f6..834c565782 100644
--- a/src/Chamilo/CourseBundle/Component/CourseCopy/CourseRestorer.php
+++ b/src/Chamilo/CourseBundle/Component/CourseCopy/CourseRestorer.php
@@ -2799,7 +2799,7 @@ class CourseRestorer
                                     // if is an sco
                                     $old_prerequisite[$new_item_id] = $item['prerequisite'];
                                 } else {
-                                    $old_prerequisite[$new_item_id] = $new_item_ids[$item['prerequisite']];
+                                    $old_prerequisite[$new_item_id] = isset($new_item_ids[$item['prerequisite']]) ? $new_item_ids[$item['prerequisite']] : '';
                                 }
                             }