How can I create a working situation in which all checkout urls point to my whmcs install? I use Prosites and Pretty plugin.
Previously opened a ticket last year but haven't been able to obtain a solution and no one has commented on it in about a month now. If possible @Jose should come in as he has previously worked on something similar previously (https://premium.wpmudev.org/forums/topic/using-pro-sites-and-whmcs-provisioning-usage-with-free-level-and-upgrade-links). Unfortunately, the codes provided did not work for me.
Please kindly assist with working codes/instructions.