While everything worked perfectly, nothing works anymore (with an Appsumo license).
When connecting via email and password, this message appears in red:
"An error occurred in the Server Components render. The specific message is omitted in production builds to avoid leaking sensitive details. A digest property is included on this error instance which may provide additional details about the nature of the error."

When connecting with Google, a blank page appears and this is written at the top right of the page:
"An error occurred during sign-in"

Same problem with other browsers.
Finally, Olly.social chrome extension also fails to connect.

I'll reconsider my opinion if all this works out, of course.