Couldn't log in with plugin

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Hi, I’m using google Ouath login for my GPTs. It has worked until yesterday. But when i tried this this afternoon, it shows this error. I changed nothing.

Also on the console, it says invalid access token. But the thing is it doesn’t even call “Token URL”. Is this just a temporary bug or GPT changed logic?

+) I checked other Google oauth GPTs which i followed an example using Google calendar, it causes the same error… Anyone knows what is happening?

+) It works fine now