Handling MobbSign Web errors

Any error occurred in MobbSign Web is notified by the onError listener, also passing the error as a parameter:

    new MobbSign({
      ...
      onError: (e: any) => this.onErrorOccurred(e),
    }).then((mobbsign: any) => {
      mobbsign.load(this.documentId);
    });

    onErrorOccurred(e: any) {
        console.error(`mobbsign error: ${e}`);
    }

Check Listening events for a more detailed description of listeners to subscribe in MobbSign Web