We tried publishing a workbook with Table Extension feature in Tableau Online, but repeatedly getting an error which we are not able to solve. Data source cannot be published too.

We followed the steps mention in Tableau help website and tried to implement the dashboard in a published workbook and this would close Tableau abruptly. Can we get a clear understanding of Tableau Table Extension Feature introduced in 2022.4?

We have attached the error screenshot and workbook for your reference.