I honestly don't get it. Like I said, I've tried Hot Spotting the Firestick to my phones internet and it works, I tried it at my girlfriend's house, on her her Virgin Wi-Fi and it worked, it's just on my home Wi-Fi that it doesn't work. Literally from one minute to the next, so frustrating. Let me know if you figure it and I'll do the same.
What happens on yours? Do you have IPTV? Are your apps working?
Good luck!