Consolidating my comments into an answer
It seems to be worse than this– the feed URL is different altogether, which has presumably broken many a reader; it definitely broke mine:

On 3/13, via the log from my reader above, the page was fine, then spit back 403 forbidden with no content, and now it spits back 553 and shows a "not found" page when attempting to access it in-browser:

The original URL I have saved, and which Internet Archive confirms was the one on the page before the design change, is https://www.stackstatus.net/data/rss.xml. Now, the page gives https://www.stackstatus.net/history.rss, which contains the scripting and fails to load in my reader.