diff --git a/src/ts/@overflow/commons/websocket/WebSocketRPC.ts b/src/ts/@overflow/commons/websocket/WebSocketRPC.ts
index 354fef8..a5bf32c 100644
--- a/src/ts/@overflow/commons/websocket/WebSocketRPC.ts
+++ b/src/ts/@overflow/commons/websocket/WebSocketRPC.ts
@@ -158,6 +158,9 @@ export default class WebSocketRPC {
               case 2:
                 errorName = msgs[0];
                 errorMessage = msgs[1];
+                if ('null' === errorMessage) {
+                  errorMessage = null;
+                }
                 break;
               default:
                 break;