Hi @bruceallen,
Thank you for having a look. The xmlrpc.php file was indeed missing. I re-installed WordPress and reactivated Jetpack. It does seem to be fixed and the website seems to be working as expected, albeit a bit slow but i’ll have to work that out with WP-rocket or something similar.
Thanks again!
p.s. I did have to disable some settings from my hosting, can I enable them again now that the site is working?