Since some time (a pair of weeks) i can't run no third party Google Sheet or Google Sheets add-on.
Trying to do so i'm forced to run through the usual authentification andon the end of it i get the alert "Sign in with Google is temporarily disabled for this app". The alert comes without a link "advanced", so it isn't possible to go around of the alert.
This happens with all Google accounts i can login into (privat account, firm's account). Noone of these accounts is a GSuite - all are just normal account created with GMail. Nobody other, who uses the same firm's account (we are a couple of users having access to it), doesn't experiencing this issue.
How can i debug and fix this issue?
PS: the limitation to 100 users is definitely not the problem. After i experienced this problem firtsly i thought, this could be the cause.
But after i failed to use multiple Google Sheets published publicly and having multiple users and Google Sheets addons, published in Google's official addon marketplace, and having multiple users too, i don't think, the limitation is the cause of the issue.
This is the alert coming while authentification: