Oh wow, I had no idea this had been marked solved, as it really isn’t.
@Quantum, no, my key was purchased post 4->5, and the issue is a connection between 2 servers.
I talked to my provider, they said they’re not sure what the issue is but they were seeing 403 Forbidden when trying to cURL to the addresses mentioned earlier in this thread. (ie http://connect.advancedcustomfields.com/index.php?a=get-info&p=pro)
They originally thought that maybe the servers were blocking some IPs. Potential IPs that the ACF Host may be blocking/denying:
Primary: 184.106.10.128
Secondary: 184.106.10.129 – 184.106.10.135 | 184.106.55.253
Or it could be that there needs to be some sort of verification/authentication that is not getting through on the POST.
