Unable to register the client error after upgrade v7

I already deactivated unlock CORS extension.
I changed my cors settings just like you send.

Here is my calls :

Ok, can you please show me the details of the OPTIONS request on /authentication and also the content of your console, that is probably showing more info about the error?

I need to see all the headers from the OPTIONS request.

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Ok, we fixed this together during a call. The configuration file .env was missing the new configuration variable named APPLICATION_URL. So it was pointing to a default URL which was not correct.

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