BUG: in AccessControl Job

src/main/java/caosdb/server/database/backend/implementation/MySQL/MySQLRetrievePermissionRules.java

@@ -59,7 +59,7 @@ public class MySQLRetrievePermissionRules extends MySQLTransaction
     } catch (final ConnectionException e) {
       throw new TransactionException(e);
     }
-    return null;
+    return new HashSet<>();
   }
 
   @SuppressWarnings("unchecked")

src/main/java/caosdb/server/jobs/core/AccessControl.java

@@ -68,13 +68,11 @@ public class AccessControl extends ContainerJob {
         if (par1.hasId() && par1.getId() > 0) {
           Database.execute(new RetrieveSparseEntity(par1), getTransaction().getAccess());
         }
-        if (par1.getName().equals("CommentAnnotation")) {
-          if (subject.isPermitted(
-              getTransaction().getClass().getSimpleName() + ":CommentAnnotation")) {
+        if (par1.hasName() && par1.getName().equals("CommentAnnotation") && subject
+            .isPermitted(getTransaction().getClass().getSimpleName() + ":CommentAnnotation")) {
           continue;
         }
       }
-      }
       e.setEntityStatus(EntityStatus.UNQUALIFIED);
       e.addMessage(ServerMessages.AUTHORIZATION_ERROR);
     }