I would say the uploader could use logs. I've had trouble before but not that exact error. No indication what the problem is or even on what end. As far as I'm aware, you might need a dev to interpret that. The most we could probably do is find problems with your metadata etc.
Alright, the problem solved. I'm not really sure how, there was probably an error in some files. Well, I just simply remade the mod, now it works just fine. Still, thanks for response!