My website is missing?

Hoping someone out there can help! Tried logging onto my website today and received the following message “Object moved to here.” The “here” was a hyperlink, so I clicked it and was directed to “WebKnight Application Firewall Alert”. I’ve made no changed to my site and it was working as it should on Monday. I’ve put in a help ticket with my host provider and I was hoping that maybe some on here might have a solution.

Thank you.

URL?