Website just broke: The requested URL / was not found on this server. PLEASE HELP

the website is

downblocked says everything is up but I keep getting this message:

[u][b]Not Found

The requested URL / was not found on this server.

Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request.[/b][/u]
the website was still working a few hours ago. If anyone can help that would be appreciated. Thanks.
Domain Time To Live IP Address Responding 10046 Online

All IP Addresses of are online.

Domain Time To Live Name Server Responding 14399 Online 14399 Online 14399 Online

Did you make any changes leading up to this event? DNS is resolving correctly, and the server is answering, it just can’t seem to find the content for the page.

If you or someone else associated with you made absolutely no changes to anything leading up to this, then open a ticket with support and ask them to check if the site has been hacked.

^ nope. no changes were made. Thanks for the advice.

last time my site was attacked, some of the mods here managed to get the site back up for me. I am the admin for the site but the site owner cannot be reached for now.

thanks for answering.
it also seems like the site has been continually attacked over the last few months