Overview
Beat him now.Do it every part you can`t pass when you have to press E.
Beat Stross
Hold aim (Mouse 2) and press mouse 1 with E, keep pressing until you made it.
It will happen here too.
Do the same thing.
Hold Aim (Mouse 2) and press to shoot (mouse 1) do it with E.
Its some kind of bug that happens in this part.
Its happens by a bug, i don’t know if this happens with other people, but there it is. I hope its helps