diff --git a/application/Espo/Classes/Acl/Note/AccessChecker.php b/application/Espo/Classes/Acl/Note/AccessChecker.php
index 6161eb33d0..e59b41daea 100644
--- a/application/Espo/Classes/Acl/Note/AccessChecker.php
+++ b/application/Espo/Classes/Acl/Note/AccessChecker.php
@@ -134,7 +134,7 @@ class AccessChecker implements AccessEntityCREDChecker
         }
 
         if ($entity->getTargetType() === Note::TARGET_TEAMS) {
-            $targetTeamIdList = $entity->getLinkMultipleIdList('teams');
+            $targetTeamIdList = $entity->getLinkMultipleIdList('teams') ?? [];
 
             foreach ($user->getTeamIdList() as $teamId) {
                 if (in_array($teamId, $targetTeamIdList)) {
@@ -146,7 +146,7 @@ class AccessChecker implements AccessEntityCREDChecker
         }
 
         if ($entity->getTargetType() === Note::TARGET_USERS) {
-            return in_array($user->getId(), $entity->getLinkMultipleIdList('users'));
+            return in_array($user->getId(), $entity->getLinkMultipleIdList('users') ?? []);
         }
 
         return false;
diff --git a/application/Espo/Classes/AclPortal/Note/AccessChecker.php b/application/Espo/Classes/AclPortal/Note/AccessChecker.php
index d7403e9f2c..c28447b511 100644
--- a/application/Espo/Classes/AclPortal/Note/AccessChecker.php
+++ b/application/Espo/Classes/AclPortal/Note/AccessChecker.php
@@ -126,7 +126,7 @@ class AccessChecker implements AccessEntityCREDChecker
         }
 
         if ($entity->getTargetType() === Note::TARGET_PORTALS) {
-            return in_array($user->getPortalId(), $entity->getLinkMultipleIdList('portals'));
+            return in_array($user->getPortalId(), $entity->getLinkMultipleIdList('portals') ?? []);
         }
 
         return false;