Google-integration completely dead!

I have been using your service for a long time. And I have forms submitting to Google Spreadsheets. This has been working for years. Now, yesterday, completely dead. Nothing works. I have re-established the connection (which seems to work), but no data from form is submitted to the sheet. I have created a brand new form, - still the same situation. I have deleted the permissions at Google, and re-established them, - still nothing. Data is saved within forms.app, but they are not transferred to Google.

PLEASE HELP!