Ok, it could be that the payerID is not configured in your scopes. I can double check that but I need your account email, the one who is processing the login-with-paypal and the payments but send me a private message, don't share it here.
To enable the Private Message function:
- click on the top right icon of your profile - click on "Preferences" - under the "Personal" tab you will find "Private Messenger" - click on it to turn it on/off
Once enabled you will see next to your profile icon a letter icon, if you click on it you can send a private message
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