Can't move pawn when standing on a BlockAll

I’m trying to implement a trivial platformer functionality where you can control your character and move left and right. Since I started from the 2D template, it was already working - I changed the sprite to mine, the backround to mine and the character started acting weird - the moving still works but only as long as the character is falling down, whenever it lands on any BlockAll actor (even the one that used to be working in the beginning!) the animation corresponding to moving left or right works but the pawn itself stands in place. Why could that be? I’m clueless cause I haven’t even changed anything important yet.