Default Hisense Sero 7 Pro APX mode

My tablet has been on APX mode for weeks now. It happened after my tablet froze. I turned my tablet off thinking that if i restart it, it would go back to normal but i turned it off and tried turning it back on it didn't respond so i plugged it in to my computer and noticed it said it was in APX mode. Can someone tell me what i can do. Any help would be appreciated.