Checked on an App made from scratch. The problem is still not solved.
When trying to run Printing/Scanning Apps created using Google Drive or OneDrive templates with the Russian UI enabled on the MFP leads to an error -- see attachment. When changing the language (at the SAME MFP) UI to English or Ukrainian, everything works well.
Translation of the error message from Russian:
The service you are trying to use may be temporarily unavailable. If this error occurs again, close the application and try again later.