how to exclude search results from a specific country?

this url: https://www.imdb.com/search/title/?title_type=feature&release_date=2018-01-01,2018-12-31&adult=include&sort=num_votes,desc&count=250&!countries=in used to work in excluding movies from India (via the "!countries=in" part in the URL) but now it no longer works.

any suggestions in how i can now filter/exclude a specific country?