Thank you so much!! – the header code is sorted now, however, I’m still having issues with the permalink structure :'(
I’ve reverted to the “Plain” permalink structure in settings and the page starts working again with the url style: https://minesteps.com/?page_id=195
Every time I switch the structure to “Post name” I get the error page you showed earlier.
Could this be something to do with the host provider?
Skimming over this article and wondering if it could be to do with the permissions set?