All AI functions are working ok, but AI search gives 500 error

thanks @Jagster

And, yes, you’re right. I’m self hosted.
I tried finding the option to ‘turn-off’ AI assisted search thru/in the main (Top-Right corner) search field, but couldn’t find or search that option (either in ‘Admin Settings’, or Under ‘Ai-Settings’).

If you could just guide, where that might be.