diff --git a/main/exercise/exercise.class.php b/main/exercise/exercise.class.php
index e68b0db981b..2b64c669ea8 100755
--- a/main/exercise/exercise.class.php
+++ b/main/exercise/exercise.class.php
@@ -9909,15 +9909,29 @@ public static function exerciseGrid(
                                 );
                             } else {
                                 if ($row['active'] == 0 || $visibility == 0) {
-                                    $visibility = Display::url(
-                                        Display::return_icon(
-                                            'invisible.png',
-                                            get_lang('Activate'),
-                                            '',
-                                            ICON_SIZE_SMALL
-                                        ),
-                                        'exercise.php?'.api_get_cidreq().'&choice=enable&sec_token='.$token.'&exerciseId='.$row['iid']
+                                    $visibleOnBaseCourse = api_get_item_visibility(
+                                        $courseInfo,
+                                        TOOL_QUIZ,
+                                        $row['iid'],
+                                        0
                                     );
+
+                                    if ($visibleOnBaseCourse) {
+                                        $visibility = Display::url(
+                                            Display::return_icon(
+                                                'invisible.png',
+                                                get_lang('Activate'),
+                                                '',
+                                                ICON_SIZE_SMALL
+                                            ),
+                                            'exercise.php?'.api_get_cidreq().'&choice=enable&sec_token='.$token.'&exerciseId='.$row['iid']
+                                        );
+                                    } else {
+                                        $visibility = Display::return_icon(
+                                            'invisible.png',
+                                            get_lang('Activate')
+                                        );
+                                    }
                                 } else {
                                     // else if not active
                                     $visibility = Display::url(
diff --git a/main/exercise/exercise.php b/main/exercise/exercise.php
index e1ed08c1db7..ccf93bd0d5c 100644
--- a/main/exercise/exercise.php
+++ b/main/exercise/exercise.php
@@ -266,6 +266,18 @@ function showUserToSendNotificacion(element) {
                         break;
                     }
 
+                    $visibleOnBaseCourse = api_get_item_visibility(
+                        $courseInfo,
+                        TOOL_QUIZ,
+                        $objExerciseTmp->iid,
+                        0
+                    );
+
+                    if (!$visibleOnBaseCourse) {
+                        Display::addFlash(Display::return_message(get_lang('CanNotHide') . ' ' . $objExerciseTmp->name, 'error'));
+                        break;
+                    }
+
                     // enables an exercise
                     if (empty($sessionId)) {
                         $objExerciseTmp->enable();