diff --git a/psalm.xml b/psalm.xml
index b276e17a9f..86182f9ddb 100644
--- a/psalm.xml
+++ b/psalm.xml
@@ -1,6 +1,5 @@
 <?xml version="1.0"?>
 <psalm
-    totallyTyped="false"
     resolveFromConfigFile="true"
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     xmlns="https://getpsalm.org/schema/config"
diff --git a/public/main/admin/update_schema.php b/public/main/admin/update_schema.php
index aee5a2ed32..e27abf35d1 100644
--- a/public/main/admin/update_schema.php
+++ b/public/main/admin/update_schema.php
@@ -14,14 +14,14 @@ if (true != api_get_configuration_value('sync_db_with_schema')) {
 
 $em = Database::getManager();
 $connection = Database::getManager()->getConnection();
-$sm = $connection->getSchemaManager();
+$sm = $connection->createSchemaManager();
 $fromSchema = $sm->createSchema();
 
 $tool = new \Doctrine\ORM\Tools\SchemaTool(Database::getManager());
 $metadatas = $em->getMetadataFactory()->getAllMetadata();
 $toSchema = $tool->getSchemaFromMetadata($metadatas);
 $comparator = new \Doctrine\DBAL\Schema\Comparator();
-$schemaDiff = $comparator->compare($fromSchema, $toSchema);
+$schemaDiff = $comparator->compareSchemas($fromSchema, $toSchema);
 
 $sqlList = $schemaDiff->toSaveSql($connection->getDatabasePlatform());
 $content = '';
diff --git a/public/main/admin/user_edit.php b/public/main/admin/user_edit.php
index 2f4b53f201..9afb859616 100644
--- a/public/main/admin/user_edit.php
+++ b/public/main/admin/user_edit.php
@@ -321,7 +321,7 @@ if (!empty($studentBossList)) {
     $studentBossList = array_column($studentBossList, 'boss_id');
 }
 
-$user_data['student_boss'] = array_values($studentBossList);
+$user_data['student_boss'] = $studentBossList;
 $form->addMultiSelect('student_boss', get_lang('Superior (n+1)'), $studentBossToSelect);
 
 // EXTRA FIELDS
diff --git a/public/main/exercise/exercise.class.php b/public/main/exercise/exercise.class.php
index fba61edf2b..3601249931 100644
--- a/public/main/exercise/exercise.class.php
+++ b/public/main/exercise/exercise.class.php
@@ -609,7 +609,7 @@ class Exercise
     /**
      * @param int    $start
      * @param int    $limit
-     * @param int    $sidx
+     * @param string $sidx
      * @param string $sord
      * @param array  $whereCondition
      * @param array  $extraFields
diff --git a/public/main/gradebook/lib/be/category.class.php b/public/main/gradebook/lib/be/category.class.php
index eafee074bf..cd582ecd45 100644
--- a/public/main/gradebook/lib/be/category.class.php
+++ b/public/main/gradebook/lib/be/category.class.php
@@ -833,7 +833,7 @@ class Category implements GradebookItem
      * @param string $course_code
      * @param int    $session_id
      *
-     * @return array (score sum, weight sum) or null if no scores available
+     * @return array|null (score sum, weight sum) or null if no scores available
      */
     public function calc_score(
         $studentId = null,
@@ -846,9 +846,9 @@ class Category implements GradebookItem
         $cacheAvailable = api_get_configuration_value('apc') && $useCache;
 
         if ($cacheAvailable) {
-            $cacheDriver = new \Doctrine\Common\Cache\ApcuCache();
-            if ($cacheDriver->contains($key)) {
-                return $cacheDriver->fetch($key);
+            $cache = new \Symfony\Component\Cache\Adapter\ApcuAdapter();
+            if ($cache->hasItem($key)) {
+                return $cache->getItem($key)->get();
             }
         }
         // Classic
@@ -1092,14 +1092,20 @@ class Category implements GradebookItem
             case 'average':
                 if (empty($ressum)) {
                     if ($cacheAvailable) {
-                        $cacheDriver->save($key, null);
+                        $cacheItem = $cache->getItem($key);
+                        $cacheItem->set(null);
+
+                        $cache->save($cacheItem);
                     }
 
                     return null;
                 }
 
                 if ($cacheAvailable) {
-                    $cacheDriver->save($key, [$ressum, $weightsum]);
+                    $cacheItem = $cache->getItem($key);
+                    $cacheItem->set([$ressum, $weightsum]);
+
+                    $cache->save($cacheItem);
                 }
 
                 return [$ressum, $weightsum];
@@ -1113,11 +1119,13 @@ class Category implements GradebookItem
                 break;
             default:
                 if ($cacheAvailable) {
-                    $cacheDriver->save($key, [$ressum, $weightsum]);
+                    $cacheItem = $cache->getItem($key);
+                    $cacheItem->set([$ressum, $weightsum]);
+
+                    $cache->save($cacheItem);
                 }
 
                 return [$ressum, $weightsum];
-                break;
         }
     }
 
diff --git a/public/main/gradebook/lib/be/exerciselink.class.php b/public/main/gradebook/lib/be/exerciselink.class.php
index e7140c18de..dc6b12059f 100644
--- a/public/main/gradebook/lib/be/exerciselink.class.php
+++ b/public/main/gradebook/lib/be/exerciselink.class.php
@@ -198,9 +198,9 @@ class ExerciseLink extends AbstractLink
         $cacheAvailable = api_get_configuration_value('apc') && $useCache;
         $cacheDriver = null;
         if ($cacheAvailable) {
-            $cacheDriver = new \Doctrine\Common\Cache\ApcuCache();
-            if ($cacheDriver->contains($key)) {
-                return $cacheDriver->fetch($key);
+            $cache = new \Symfony\Component\Cache\Adapter\ApcuAdapter();
+            if ($cache->hasItem($key)) {
+                return $cache->getItem($key)->get();
             }
         }
 
@@ -287,7 +287,9 @@ class ExerciseLink extends AbstractLink
                 }
                 $result = [$data['score'], $data['max_score'], $data['exe_date'], $counter];
                 if ($cacheAvailable) {
-                    $cacheDriver->save($key, $result);
+                    $cacheItem = $cache->getItem($key);
+                    $cacheItem->set($result);
+                    $cache->save($cacheItem);
                 }
 
                 return $result;
diff --git a/public/main/inc/lib/TicketManager.php b/public/main/inc/lib/TicketManager.php
index e9d3a8563b..7a4622209b 100644
--- a/public/main/inc/lib/TicketManager.php
+++ b/public/main/inc/lib/TicketManager.php
@@ -2355,7 +2355,7 @@ class TicketManager
     public static function deleteUserFromTicketSystem($userId)
     {
         $userId = (int) $userId;
-        $schema = Database::getManager()->getConnection()->getSchemaManager();
+        $schema = Database::getManager()->getConnection()->createSchemaManager();
 
         if ($schema->tablesExist('ticket_assigned_log')) {
             $sql = "UPDATE ticket_assigned_log SET user_id = NULL WHERE user_id = $userId";
diff --git a/public/main/inc/lib/urlmanager.lib.php b/public/main/inc/lib/urlmanager.lib.php
index 9091452b36..63ee60bb13 100644
--- a/public/main/inc/lib/urlmanager.lib.php
+++ b/public/main/inc/lib/urlmanager.lib.php
@@ -124,7 +124,7 @@ class UrlManager
                 WHERE url = '".Database::escape_string($url)."' ";
         $res = Database::query($sql);
 
-        return (int) Database::num_rows($res);
+        return Database::num_rows($res);
     }
 
     /**
@@ -298,7 +298,7 @@ class UrlManager
                 WHERE c_id = '$courseId'";
         $res = Database::query($sql);
 
-        return (int) Database::num_rows($res);
+        return Database::num_rows($res);
     }
 
     /**
diff --git a/public/main/inc/lib/usermanager.lib.php b/public/main/inc/lib/usermanager.lib.php
index b55a582bbb..192cf21763 100644
--- a/public/main/inc/lib/usermanager.lib.php
+++ b/public/main/inc/lib/usermanager.lib.php
@@ -805,7 +805,8 @@ class UserManager
         }
 
         $connection = Database::getManager()->getConnection();
-        $tableExists = $connection->getSchemaManager()->tablesExist(['plugin_bbb_room']);
+        $schemaManager = $connection->createSchemaManager();
+        $tableExists = $schemaManager->tablesExist(['plugin_bbb_room']);
         if ($tableExists) {
             // Delete user from database
             $sql = "DELETE FROM plugin_bbb_room WHERE participant_id = $user_id";
@@ -813,12 +814,12 @@ class UserManager
         }
 
         // Delete user/ticket relationships :(
-        $tableExists = $connection->getSchemaManager()->tablesExist(['ticket_ticket']);
+        $tableExists = $schemaManager->tablesExist(['ticket_ticket']);
         if ($tableExists) {
             TicketManager::deleteUserFromTicketSystem($user_id);
         }
 
-        $tableExists = $connection->getSchemaManager()->tablesExist(['c_lp_category_user']);
+        $tableExists = $schemaManager->tablesExist(['c_lp_category_user']);
         if ($tableExists) {
             $sql = "DELETE FROM c_lp_category_user WHERE user_id = $user_id";
             Database::query($sql);
diff --git a/public/main/social/map.php b/public/main/social/map.php
index 1eb09fad9b..1995a02701 100644
--- a/public/main/social/map.php
+++ b/public/main/social/map.php
@@ -59,7 +59,7 @@ $sql = "SELECT u.id, firstname, lastname, ev.value ville, ev2.value stage
             (ev.value LIKE '%::%' OR ev2.value LIKE '%::%')            
 ";
 
-$cacheDriver = new \Doctrine\Common\Cache\ApcuCache();
+$cache = new \Symfony\Component\Cache\Adapter\ApcuAdapter();
 $keyDate = 'map_cache_date';
 $keyData = 'map_cache_data';
 
@@ -70,8 +70,8 @@ $now = time();
 $tomorrow = strtotime('+5 minute', $now);
 
 $loadFromDatabase = true;
-if ($cacheDriver->contains($keyData) && $cacheDriver->contains($keyDate)) {
-    $savedDate = $cacheDriver->fetch($keyDate);
+if ($cache->hasItem($keyData) && $cache->hasItem($keyDate)) {
+    $savedDate = $cache->getItem($keyDate)->get();
     $loadFromDatabase = false;
     if ($savedDate < $now) {
         $loadFromDatabase = true;
@@ -83,10 +83,15 @@ if ($loadFromDatabase) {
     $result = Database::query($sql);
     $data = Database::store_result($result, 'ASSOC');
 
-    $cacheDriver->save($keyData, $data);
-    $cacheDriver->save($keyDate, $tomorrow);
+    $cacheItem = $cache->getItem($keyData);
+    $cacheItem->set($data);
+    $cache->save($cacheItem);
+
+    $cacheItem = $cache->getItem($keyDate);
+    $cacheItem->set($tomorrow);
+    $cache->save($cacheItem);
 } else {
-    $data = $cacheDriver->fetch($keyData);
+    $data = $cache->getItem($keyData)->get();
 }
 
 foreach ($data as &$result) {
diff --git a/src/CoreBundle/Controller/Api/AbstractFeedbackSocialPostController.php b/src/CoreBundle/Controller/Api/AbstractFeedbackSocialPostController.php
index 2c276b4a02..5798307d6f 100644
--- a/src/CoreBundle/Controller/Api/AbstractFeedbackSocialPostController.php
+++ b/src/CoreBundle/Controller/Api/AbstractFeedbackSocialPostController.php
@@ -15,7 +15,6 @@ use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
 use Symfony\Component\HttpKernel\Attribute\AsController;
 use Symfony\Component\Security\Core\Exception\AccessDeniedException;
 use Symfony\Component\Security\Core\Security;
-use Symfony\Component\Security\Core\User\UserInterface;
 
 #[AsController]
 abstract class AbstractFeedbackSocialPostController extends AbstractController
diff --git a/src/CoreBundle/Controller/CourseController.php b/src/CoreBundle/Controller/CourseController.php
index 9407376af8..8ed7206769 100644
--- a/src/CoreBundle/Controller/CourseController.php
+++ b/src/CoreBundle/Controller/CourseController.php
@@ -39,6 +39,7 @@ use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\HttpFoundation\Response;
 use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;
 use Symfony\Component\Routing\Annotation\Route;
+use Symfony\Component\Serializer\SerializerInterface;
 use Symfony\Component\Validator\Exception\ValidatorException;
 use UserManager;
 
@@ -48,6 +49,10 @@ use UserManager;
 #[Route('/course')]
 class CourseController extends ToolBaseController
 {
+    public function __construct(private SerializerInterface $serializer)
+    {
+    }
+
     #[Route('/{cid}/checkLegal.json', name: 'chamilo_core_course_check_legal_json')]
     public function checkTermsAndConditionJson(Request $request, LegalRepository $legalTermsRepo, LanguageRepository $languageRepository): Response
     {
@@ -119,7 +124,7 @@ class CourseController extends ToolBaseController
             }
         }
 
-        $json = $this->get('serializer')->serialize(
+        $json = $this->serializer->serialize(
             $responseData,
             'json',
             [
@@ -288,7 +293,7 @@ class CourseController extends ToolBaseController
             'tools' => $tools,
         ];
 
-        $json = $this->get('serializer')->serialize(
+        $json = $this->serializer->serialize(
             $responseData,
             'json',
             [
diff --git a/src/CoreBundle/Controller/ResetPasswordController.php b/src/CoreBundle/Controller/ResetPasswordController.php
index 7248691850..834b64612c 100644
--- a/src/CoreBundle/Controller/ResetPasswordController.php
+++ b/src/CoreBundle/Controller/ResetPasswordController.php
@@ -7,6 +7,8 @@ namespace Chamilo\CoreBundle\Controller;
 use Chamilo\CoreBundle\Entity\User;
 use Chamilo\CoreBundle\Form\ChangePasswordFormType;
 use Chamilo\CoreBundle\Form\ResetPasswordRequestFormType;
+use Chamilo\CoreBundle\Repository\Node\UserRepository;
+use Doctrine\ORM\EntityManagerInterface;
 use Symfony\Bridge\Twig\Mime\TemplatedEmail;
 use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
 use Symfony\Component\HttpFoundation\RedirectResponse;
@@ -27,8 +29,11 @@ class ResetPasswordController extends AbstractController
 
     private ResetPasswordHelperInterface $resetPasswordHelper;
 
-    public function __construct(ResetPasswordHelperInterface $resetPasswordHelper)
-    {
+    public function __construct(
+        ResetPasswordHelperInterface $resetPasswordHelper,
+        private EntityManagerInterface $entityManager,
+        private UserRepository $userRepository
+    ) {
         $this->resetPasswordHelper = $resetPasswordHelper;
     }
 
@@ -115,7 +120,7 @@ class ResetPasswordController extends AbstractController
             );
 
             $user->setPassword($encodedPassword);
-            $this->getDoctrine()->getManager()->flush();
+            $this->entityManager->flush();
 
             // The session is cleaned up after the password has been changed.
             $this->cleanSessionAfterReset();
@@ -130,7 +135,7 @@ class ResetPasswordController extends AbstractController
 
     private function processSendingPasswordResetEmail(string $emailFormData, MailerInterface $mailer): RedirectResponse
     {
-        $user = $this->getDoctrine()->getRepository(User::class)->findOneBy([
+        $user = $this->userRepository->findOneBy([
             'email' => $emailFormData,
         ]);
 
diff --git a/src/CoreBundle/Controller/SessionController.php b/src/CoreBundle/Controller/SessionController.php
index d84cfb4e05..ed3a02678b 100644
--- a/src/CoreBundle/Controller/SessionController.php
+++ b/src/CoreBundle/Controller/SessionController.php
@@ -20,6 +20,7 @@ use Chamilo\CoreBundle\Repository\SequenceRepository;
 use Chamilo\CoreBundle\Repository\TagRepository;
 use Chamilo\CourseBundle\Entity\CCourseDescription;
 use CourseDescription;
+use Doctrine\ORM\EntityManagerInterface;
 use Doctrine\ORM\EntityRepository;
 use Essence\Essence;
 use ExtraFieldValue;
@@ -39,11 +40,15 @@ class SessionController extends AbstractController
      *
      * @Entity("session", expr="repository.find(sid)")
      */
-    public function aboutAction(Request $request, Session $session, IllustrationRepository $illustrationRepo, UserRepository $userRepo): Response
-    {
+    public function aboutAction(
+        Request $request,
+        Session $session,
+        IllustrationRepository $illustrationRepo,
+        UserRepository $userRepo,
+        EntityManagerInterface $em
+    ): Response {
         $requestSession = $request->getSession();
         $htmlHeadXtra[] = api_get_asset('readmore-js/readmore.js');
-        $em = $this->getDoctrine()->getManager();
 
         $sessionId = $session->getId();
         $courses = [];