I'm trying to create a search functionality using Search Movie API using this URL:
https://api.themoviedb.org/3/search/movie?api_key=***?query=superman

However, this is returned:

{"status_code":7,"status_message":"Invalid API key: You must be granted a valid key.","success":false}

But I've been using other TMDB APIs with this exact same API key and they work without problems

Am I doing anything wrong?