Added an error message to SQLForm if we can't find the privileges of the database link

fix: Sometimes the error message for the Calendar Update Feeds is part of the content response.
fix: Serial workflows no longer get held up in the queue

lib/WebGUI/Asset/Wobject/SQLForm.pm

@@ -662,6 +662,14 @@ sub _databaseLinkHasPrivileges {
 		}
 	}
 
+    # Check if we found any privileges at all
+    if (!@privileges) {
+        $self->session->errorHandler->warn(
+            "SQLForm: Could not find SQL privileges or no privileges on database '$databaseName' for user '".$dbLink->get->{username}."' with database link ID '".$dbLink->getId."' using DSN '".$dbLink->get->{dsn}."'"
+        );
+        return 0;
+    }
+
 	# Check if all required privs are present.
 	return 1 if (isIn('ALL PRIVILEGES', @privileges));