Fix VPS Server 500 errors with codecanyon real estate agency portal

Job ID: 32247206

Budget: $10 – $30 USD

I'm looking for someone that is good with VPS server configuration. I've purchased & installed this script from codecanyon https://codecanyon.net/item/real-estate-agency-portal/6539169
The script is having issues when I save using the backend.
It causes:
This page isn’t workingproperty.bluemonet.in is currently unable to handle this request.
HTTP ERROR 500
After this point the website is no longer accessible. I've tried installing the script on 2 different VPS service providers with same issue.
The script Author has stated that it is a server issue.
The author thinks this will be a very quick fix.
Related categories: PHP Linux Apache MySQL VPS