Cannot access page

I had created a WordPress website a few weeks ago. I tried logging in a few days ago and I can’t access it because it shows that I need to download WordPress….again (when I log in www.remarpro.com). My website is operating normally. Surprisingly I can’t seem to access my hosting provider either. What could be the case?

Thank you very much in advance!

The page I need help with: [log in to see the link]