Some Portfolio Items are not Mobile Responsive. PLEASE HELP.

Some of my Portfolio items are not being mobile responsive (primarily the more recent posts) e.g.
Everything else on the website works great, its just portfolio items that have the issue. They just wont load on mobiles. People when trying to load the pages get the below message.
"A problem repeatedly occurred on “”"
I have paid for support and have posted three tickets asking for help and have not been responded to.
I have had this issue for over a month now and am loosing work/money. Paying for support was a waste of money, don’t do it.

Is there anyone here that help? Please. Anyone experienced the same issue?

I have tried reposting and have updated all the updates and still no love. I have also contacted my hosting provided who has confirmed it’s nothing at their end.

Kindest regards