Level 5* of Level Up mode not working

Level 5*, the final level of World 5 (7th chords) that uses real songs is not working. i click on the level, select a star difficulty (1.2, or 3) then hit Start as usual, but then on the game screen no YouTube song loads and you’re just stuck there. Have tried on safari, chrome, and edge, across iPhone iPad and pc, same problem every time. Please please please fix this, I was progressing so well with 7th chords and finally unlocked final level which is where all the real gains are made, so was super disappointing to find it not working :(((