diff --git a/public/main/inc/lib/agenda.lib.php b/public/main/inc/lib/agenda.lib.php
index 777d740655..ec889e3aee 100644
--- a/public/main/inc/lib/agenda.lib.php
+++ b/public/main/inc/lib/agenda.lib.php
@@ -168,7 +168,7 @@ class Agenda
      */
     public function setType($type)
     {
-        $type = (string) trim($type);
+        $type = trim($type);
         $typeList = $this->getTypes();
         if (in_array($type, $typeList, true)) {
             $this->type = $type;
diff --git a/public/main/install/install.lib.php b/public/main/install/install.lib.php
index e9216b431b..ceb17a3951 100644
--- a/public/main/install/install.lib.php
+++ b/public/main/install/install.lib.php
@@ -615,7 +615,7 @@ function display_language_selection()
         <div class="install-icon">
             <img width="150px;" src="chamilo-install.svg"/>
         </div>
-        <h2 class="install-title">
+        <h2 class="text-2xl">
             <?php echo display_step_sequence(); ?>
             <?php echo get_lang('Installation Language'); ?>
         </h2>
@@ -1469,7 +1469,7 @@ function display_database_settings_form(
     echo '</div></div>';
     if (INSTALL_TYPE_UPDATE != $installType) { ?>
         <button type="submit" class="btn btn-primary" name="step3" value="step3">
-            <em class="fa fa-refresh"> </em>
+            <em class="fa fa-sync"> </em>
             <?php echo get_lang('Check database connection'); ?>
         </button>
         <?php
@@ -1553,7 +1553,7 @@ function display_database_settings_form(
 
    <div class="btn-group" role="group">
        <button type="submit" name="step2"
-               class="btn btn-secondary float-right" value="&lt; <?php echo get_lang('Previous'); ?>" >
+               class="btn btn-secondary" value="&lt; <?php echo get_lang('Previous'); ?>" >
            <em class="fa fa-backward"> </em> <?php echo get_lang('Previous'); ?>
        </button>
        <input type="hidden" name="is_executable" id="is_executable" value="-" />
@@ -1902,7 +1902,7 @@ function display_configuration_settings_form(
     <div class='btn-group'>
         <button
             type="submit"
-            class="btn btn-secondary pull-right"
+            class="btn btn-secondary "
             name="step3" value="&lt; <?php echo get_lang('Previous'); ?>" >
                 <em class="fa fa-backward"> </em> <?php echo get_lang('Previous'); ?>
         </button>
diff --git a/public/main/template/default/forum/list.html.twig b/public/main/template/default/forum/list.html.twig
index 8ffc234369..8a3e0e1dca 100644
--- a/public/main/template/default/forum/list.html.twig
+++ b/public/main/template/default/forum/list.html.twig
@@ -63,7 +63,7 @@
                 {% endset %}
             {% else %}
                 {% set panel_title %}
-                    <a href="{{ item.url }}" title="{{ item.title }}">
+                    <a href="{{ item.url }}" title="{{ item.title }}" class="flex flex-row gap-2">
                         <span class="open">{{ 'forum_blue.png'|img(32) }}</span>
                         {{ item.title }}{{ item.icon_session }}
                     </a>
diff --git a/src/CoreBundle/Entity/UserCareer.php b/src/CoreBundle/Entity/UserCareer.php
index e77177e1ff..45291b1946 100644
--- a/src/CoreBundle/Entity/UserCareer.php
+++ b/src/CoreBundle/Entity/UserCareer.php
@@ -6,7 +6,6 @@ declare(strict_types=1);
 
 namespace Chamilo\CoreBundle\Entity;
 
-use DateTime;
 use Doctrine\ORM\Mapping as ORM;
 use Gedmo\Timestampable\Traits\TimestampableEntity;