Hello,
I hope this message finds you well. We've been encountering blocking errors (Service getProjectById failed. Error code: 400 , Error message: {"errors":[{"error_code":"1400","message":"Problem occured - null"}]}) in the Adobe Developer Console since last week. Specifically, we are unable to add new Adobe App Builder projects, and adding new workspaces to existing projects is also not possible. Attached are screenshots for your reference. Could you please assist us with resolving this issue?