Here is an explanation about what happened https://groups.google.com/g/mitappinventortest/c/YPxwZn_a1rQ/m/PLpq4360BwAJ
MIT is creating and testing an alternative to the old FusionTable Control Built In Google Sheets Component for App Inventor
If you built the Pizza Party app using the Fusion Tables, Tim made this tutorial showing how to build the example app using the MIT CloudDB control
https://groups.google.com/g/mitappinventortest/c/hOx-n14lkBs/m/AKeNoY_0AwAJ
The advice might help you to convert your previous Project to something that will work.