What was the reason you were given? Technical issues? I think it would be the oversaturated colours.
here is the original
Which one did you submit that got rejected? The first one or the original that you just posted? If it was the first one, I would assume it is because of the oversaturated colours. When it comes to post processing, minimal and inconspicuous is best as stated in Adobe's Requirements for Contributing:
General editing tips
Do: Process your images subtly — clean color images that are in focus sell well.
I personally don't see much wrong with your second posted photo (original). (And I do think it is well composed and interesting subject.)
yes technical issues