Get Help With Guest Menu Errors on Toast Mobile Order & Pay®

Last updated: Jan 28, 2026, 11:36 AM

Question

Why are my guests receiving an error when adding items to their cart using Toast Mobile Order & Pay®?

Answer

If your guest is receiving a "Cannot read property 'guid' of undefined. Please try again" error when trying to add items to their cart using Toast Mobile Order & Pay®, you may need to double-check your dining option settings:

 
  1. Log in to Toast Web and navigate to Kitchen > Dining options. 
  2. Ensure you have at least one dining option set up with Dine In behavior; if not, you can edit an existing dining option to have this behavior (if appropriate) or create a new dining option using the + Add button.

    Dining options settings for Toast Mobile Order & Pay®.
  3. When finished, be sure to Save and Publish any changes.