diff --git a/Custom/Kernel/System/TextModule.pm b/Custom/Kernel/System/TextModule.pm
index 30780a7..36a9d7d 100755
--- a/Custom/Kernel/System/TextModule.pm
+++ b/Custom/Kernel/System/TextModule.pm
@@ -676,9 +676,11 @@ sub HasPermission {
 
         push(@NeededGroupPermissions, keys(%GroupList));
     }
-
+    
     # Remove empty, nested arrays
-    @NeededGroupPermissions = grep { ref($_) eq 'ARRAY' && @$_ } @NeededGroupPermissions;
+    @NeededGroupPermissions = grep {
+        (!ref($_) && defined($_)) || (ref($_) eq 'ARRAY' && @$_)
+    } @NeededGroupPermissions;
 
     if (scalar(@NeededGroupPermissions) == 0) {
         return 1;