Ok after 15 hours I finally could restore the server and the back up. With the original issue persists. I will try to be more specific.
Everything was fine until I made a snapshot in hostinger. From that moment I started having 404 and cache problems. I rolled back to my yesterday back up and it seemed that everything was working fine, but then the problems came back.
Wordpress site health said it was a Rest Api problem.
The rest api and 404 pages problems dissapear when I set the permalinks to plain, but the problem (besides I need the pretty permalinks) is that posts and pages wont' update.
As I read online, it is a rewrite problem, I already made sure I had those rules in the htaccess file, but the disappear when I refresh. Is like mod_rewrite is not working or doesn't exist.
I would really appreciate some help since the site is live but can't update anypost or page.
Thanks!!!