Hi Radu,
The error message is far from representing realty.
Please check 100% of the settings is exactly like in your instructions and like I said there’s only 1 option that is no longer available: https://www.screencast.com/t/87ZF57c7xpu
Try creating a new app and use the new ID to see if it’s working (I am sure it won’t work on mobile).
Thank you for your assistance, much appreciated.