How to make ListingPro listing Image Upload Mandatory

I would like to make listing images mandatory for the ListingPro theme. Any solution? Thanks

You should contact the item author for the support.

Bear in mind that “adding” features/function may not be covered by the free support from the item author for free.

Hi!! Thanks for your response. It seems to be an error at line 35. I do not know anything about javascript, can you check it for me?