I'm having an issue with one user I've helped setup with the KokalekaTV app on a fire TV stick 4k. Everything works for me and everyone else I've helped, but this one user keeps getting a "Playback error" whenever they try to access the PPV channels. We've uninstalled and re-installed, we've deleted and re-created users, we've done a DNS refresh and an IPTV reset.

Is there anything that I might have missed that could get these working?