Please note That we are having the same issue with our PayPay gateway since upgrading to 7.9 - Running an invoice through manually and it works. Cron works. Invoices just sit in the queue and don’t get charged.
I have a ticket open and have been trying to resolve this for 3 days. I am being told that whmcs don’t support the PayPal gateway and its not supported even though that Gateway came with the install. Does not seem very professional after reading this,
I will try changing re-billing to 0. Thanks,
jerry