PERMISSION_DENIED - server error occurred while reading from storage

When I try to manage the document studio Google Workspace add-on within an
existing google sheets file, I receive the message: “We’re sorry, a server
error occurred while reading from storage. Error code PERMISSION_DENIED.”
The document studio add-on is working correctly, but

I have been unable to mange/edit the workflow for at least one week. I
attempted in both Safari and Chrome, with the same error message.