Error while Launching activity

I HAVE A MISTAKE WITH THE EXECUTION OF MY PROJECT
Error while Launching activity SOMEONE KNOWS HOW TO CORRECT THIS ERROR

https://github.com/Austin52/App_Doc

ON THE LINK THE PROJECT CAN BE FOUND

THIS IS THE EEROR THAT I CAN NOT SOLVE

FIND THAT I HAD TO DISABLE BUT STILL PERSISTS THE PROBLEM
I HAVE ALREADY DONE CLEAN PROJECT AND MAKE PROJECT