Appian IDP - Error at Add Channel

Hi team, 

I am learning IDP (https://academy.appian.com/#/online-courses/7efa16db-521d-4d4d-9eda-f7114869b548) and at the document : IDP Add New Document Channel Exercise. I am trying to build it on my Appian Community account. I am able to Add the channel (page 6) - "Finance" but when I move to page 8 trying to see the Groups created - they aren't. Looks like this is not happening

  

I got 4 emails with the following error

I tried seeing a bit more into the process model that is failing

This was created back in Jul-2021 by community-admin. I am not sure where's the issue or don't want to play around. Can someone from Appian team fix this please.

thanks

jaideep 

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