PC using Licensed User Chinese invitees not allowed to join-error code 13215

[TNedderman]

We have an employee that uses a PC, is a licensed user, has all data center locations toggled on and is still having meeting attendees in China being unable to join the meeting due to error code 13215.

Before everyone says the attendees in China need a paid account please read the following:

We have another employee that uses a Mac, is a licensed user, has all data center locations toggled on and the same attendees are able to join their meeting link. These attendees are the same for both employees.

What the heck is the fix here?