In the search bar in the side drawer, you should be able to search for something like connect
or lemmyconnect
. Give it a few seconds to search and load up the search results. One this community shows up, you should be able to click it!
The screenshot you're sharing is the raw markup of Beehaw's custom error page. I think it's getting rendered because it's a different result from what other "typical" Lemmy instance would return in an error - either a status code or a specific error string. You can swipe it down to return to the previous view I'm pretty sure.