Hello community!
Portal search functionalty has broken on one of my portals. Customer self service portal. It was working previously and I have not been doing any dev work related to search. Site settings all look ok and in browser console all I have is -
myportal.powerappsportals.com/_services/search/7b138792-1090-45b6-9241-8f8d96d8c372 500 (Internal Server Error)

Nothing is showing at all on the front facing web page (i.e. if nothing found a friendly message would usually appear).

Same goes for the search functionality in the My Support page (above the list of cases).