The issue on cloudflares side is resolved and the site is now back on the cloudflare host.
The site has been succesfully rerouted to another provider. This has some performance decreases.
The issue is related to the web provider (cloudflare pages). I will try to reroute the website to another host.
The site gives a 500 error when loading certain files making the site unusable. I am trying to find the cause of this issue.