I'm having a similar problem, where my game works fine from WED, but fails to start at all when I publish it. I remember having this issue the last time I published it in an earlier state, but I seem to remember some files missing, and it was fairly easy to fix.

This time it is not giving me any explanation as to why it's not working. Where do I begin to look?

See my games here: https://www.indiedb.com/company/michael-klaus-schmidt