Ugh, these are just crazy Tizen issues more than they are Construct 2 issues. If they had half decent error messages it would be OK really.
The screen sizes thing looks like it enables application filtering. I don't think you want to specify any sizes at all, since Construct 2 should support any size screen already. I'll add the <feature name="http://tizen.org/feature/screen.size.all"/> tag for the next build, and I'd recommend you use that one instead.