All RSS Feeds Across Network Are Gone

We recently noticed that every single site in our network has lost its RSS feed. No feed exists at https://themajestysmen.com/feed/ or any other site on the network. We first noticed it because we're using Ultimate Branding's option of Dashboard Feeds and I first noticed a feed widget on a dashboard returning this:

RSS Error: A feed could not be found at https://themajestysmen.com/info/blog/feed/. A feed with an invalid mime type may fall victim to this error, or SimplePie was unable to auto-discover it.. Use force_feed() if you are certain this URL is a real feed.

I've tried everything I can think of (such as checking php closures and stuff). I'm not sure what SimplePie is referring to. The only thing I can think of now is that this was noticed within a week of moving our whole network to a new server. Not sure why all the feeds would have gone missing, but I can't think of any other change that we've made that would do this. Any ideas? I'll go ahead and open the Support portal for the network.