There are no events in this project, is this intended? Anyway, it seems to run fine for me, it is just the four objects (sprite, platform hitbox, tiled background and camera). No crashes. I am using Construct 0.99.84
Try copying the player sprite and then doing "Paste Clone." The Camera object will disappear. Trying to undo the paste will crash Construct. v0.99.84
This .cap is probably small and simple enough to stick on the bug tracker, which is what you should do Drule. The mantra goes "all crashes are bugs" and whatnot. It might be a corrupt .cap, or there might be a problem with cloning. Not really sure either way.
Anyway, Mr Wolf has a good question... were these copied from another .cap? And what version of Construct did you first create this .cap in?