Hello,
we have test locally that template, we have installed Quickstart and added property without any problem (wih main photo)
follow attached image.
Version of PHP5 could influence for that.
Could you give us full FTP and admin access
and then we can say more about your issue, FTP and admin access You can send to our contact form.
ordasoft.com/contact-us-form
Link on website
Joomla Admin
username
password
FTP
FTP host
FTP username
FTP password
Thanks,
Taras
OrdaSoft team.