Do you still have the same logs now you have renamed and changed everything ?
Yes https://pastebin.com/WiCA6Xfm and same 500 in the apache log
When I turn debug on I get
Worked it out finally after upgrading to php 7 got a new error hinting to mbstring.
Turns out mbstring doesn’t come installed by default in cpanel/whm.
Thanks for the assistant anyways guys.