B0nkers on "site transfer. everyting works but /pages"

I'm absolutely lost.

Transferred a site to a new host.
Test site link worked, home page worked. Admin login did not. domain.com/(any page) throws internal server error
Changed home/site URL through DB
Admin login now working.

Googled for fixes. Found a blog to use 'Better Search and Replace'. Found several areas to replace and did so.

Nothing has changed. Site still throws internal server error when trying to view anything past root URL.

http://1084847575.test.prositehosting.co.uk
http://1084847575.test.prositehosting.co.uk/testimonials/

Any thoughts?

Thanks in advance!