Attack move Click problem

So yesterday i was playing randomly. Suddenly when i started a new game i think it was the fourth, my binded attack move click to my left click didn't work. I thought its a bug and restarting lol would help. But no Now i can't find a solution. I tried evrything from deleting .json file from changing input and deleting it. I have No Freaking clue on how to fix this. Help? please? i rly dont want to go back to right clicking to farm. Thanks