This was my default search engine in Safari, the "new tab opens with" way.
Now it shows "Cloud provider terminated all my servers, service is down for the moment. Working on it. Sorry. Please use other instances on https://searx.space"
I think the admin was also hosting an invidious instance (YouTube) and a Nitter instance, so my guess would be copyright takedown or illegal content due to Nitter.
I see, thanks. These should be separate hosting accounts or platforms, to reduce blast radius.