try to uninstall than shutdown the iphone. after that, try install again unifi@play tv. make sure ur iphone never jailbreak.
my phone is never jailbreak be it on android or IOS.
have tried many times,uninstall and reinstall, restart the phone.. is still the same situation on my 11 pro max.
13 pro max, i did not unistall and reinstall since it can get to the channel menu, worried. if i do.. it will become like the 11 pro max. restart the phone, sign out , re- sign in...is the same... cant play any channel.
Make sure Lan cable in port 4 if you never change router ( tm router). Lan cable in good condition. go to setting than clear data HyypTV apps on ur stb white colour than restart. after restart, you need key in ur id and password unifi tv.
if still can't you need reset stb. after reset, key in ur id and password unifi tv.