My site is redirecting to the login screen

I got word this morning that our site was down. When I try to visit it (ejusa.org), it redirects me to the login screen (https://ejusa.org/wp-login.php?redirect_to=https%3A%2F%2Fejusa.org%2F&reauth=1).

We use multisite, and our other site (evangelical.ejusa.org) has the same behavior.

We have Sucuri installed, and it is saying that the site is clean of malicious code. I also looked back at the logs and don’t see anyone who was able to access the site.

Has anyone seen this before? Any clue what it could be?

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