Content Disappeared On Multisite Subsites

I have a multisite installation where the content just disappeared.

The main site (golfblogger dot com) is still there, and all content appears to be intact. But the subsites just return a “Nothing Found” result.

It was working fine for 2+ years. I haven’t changed anything recently (aside from regular updates).

Any idea where to start looking? (Please be kind. I’m a novice at WP)

• This topic was modified 6 years, 10 months ago by Steven Stern (sterndata).

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