Did you load 3rd party apps or try to root it?
You're not wearing any pants are you?
try unplugging it and pressing the power button for 30 seconds
Call Hisense and tell them what the message is saying. They may be able to help. But try their trouble shooting steps on their website
Chops come with gravy, and people come with trousers. Sorry.. old 90s British tv advert about Bisto Gravy sauce and pork chops.
No shoes, no PANTS, no service. Everybody knows that.