Theme Delta
how do i do when they publish an ad also insert images (mandatory images when posting an ad)

I tried to insert the plugin but without any results

or there is a way on admin that you need to set up to put a mandatory image when posting an ad
on settings I put 1 and 4

@Fabio Massaro
I heard it may have issues with jQuery v1.x, if you are on osclass 4.x, try to change it to jquery 3.x in settings > general