Fix error handling in Ack and Exec modals

src/panel-triggers/components/AckModal.tsx

@@ -135,8 +135,9 @@ export class AckModalUnthemed extends PureComponent<Props, State> {
     this.props.onSubmit(ackData).then(() => {
       this.dismiss();
     }).catch(err => {
+      const errorMessage = err.data?.message || err.data?.error || err.data || err.statusText || '';
       this.setState({
-        ackError: err.message || err.data,
+        ackError: errorMessage,
         loading: false,
       });
     });

src/panel-triggers/components/ExecScriptModal.tsx

@@ -93,7 +93,7 @@ export class ExecScriptModalUnthemed extends PureComponent<Props, State> {
         this.setState({ error: true, errorMessage: message, loading: false });
       }
     }).catch(err => {
-      let errorMessage = err.message || err.data || '';
+      let errorMessage = err.data?.message || err.data?.error || err.data || err.statusText || '';
       errorMessage = this.formatResult(errorMessage);
       this.setState({
         error: true,