From Sales > Quotes > Project Price Lists > Create Custom Pricing [button]
Normally it would process the selected price list and create a custom copy (separating it from the master price list). The 'Processing' popup briefly appears, but it fails to process and complete.
No error messages, failed to, or similar. It just doesn't seem to run. Behaviour started a few days ago.
I have tried different price lists attaching and detaching but no change.
Guidance followed:
learn.microsoft.com/.../manage-project-price-lists-sales
Also, I checked in the Dynamics mobile app and tab for Project Price Lists isn't shown