Yeah i tried even resetting It but every time i press R to draw the spear i can basically do everything exept the light attack, heavy Attack and blocking, everything else works.Attack work fine for me. In case you didn't already know, you have press R to draw the spear first. If that didn't work. Try reset the input setting to default.
I'll try to relunch the game and see if it's Just a random bug but i doubt It since i tried to use the restart function and that did nothing too.