Hello, Please check the "notifications" section of your PayPal developer account, as this is where all email communication from this environment is sent. https://developer.paypal.com/developer/notifications If you don't see the email, login to the account and go to the settings section and locate the email address on the account and there should be a "confirm" button which allows manual confirmation. This will send an email to the "notifications" section of your developer account. Check the notification, click the link within to confirm the email address.
If the issue persists, please create a new thread / post for your issue. Thanks !
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