I need to fill this side and then other side of staircase, but tools I used don't work. Tools like Bridge Edge Loops, Grid Fill and Fill always make nosense mess like if there wasn't the same amount of verteces, but I checked it and there should be right number.
I use Blender 2.80.
My thought is the problem do that pointing verteces on every step of starcase, but still don't know how to do that.