Fix: jsonrpchandler requires mappings (#3970)

src/widgets/nzbget/widget.js

@@ -4,6 +4,12 @@ const widget = {
   api: "{url}/jsonrpc",
   proxyHandler: jsonrpcProxyHandler,
   allowedEndpoints: /status/,
+
+  mappings: {
+    status: {
+      endpoint: "status",
+    },
+  },
 };
 
 export default widget;