I updated my multi-site version, and it instantly made my site not visible, not on the front end, not on the back end.

I removed the plugin with ftp and the site got restored. Then I moved into my plugins folder the older version, 2.7 if I remember correctly. Now the public side is visible, but the plugins admin page won’t come up.

I am using the latest versions of everything.

Any ideas how to fix this? The blog it happened on is the blog in my “signature”

Thanks.