I successfully obtain the token and make requests to search a song using titles. However, when I try to add a song using uri to user's queue, I get 401 permission missing error. I checked internet. My scopes are fine too:
let scopes = "user-read-private user-modify-playback-state user-read-playback-state user-read-currently-playing playlist-modify-public playlist-modify-private playlist-read-private"
User logged out on all devices. I tried Postman, too. Still get the same result although token works for searching songs.