Re: Can't write a Jingle now - Since July 18, 2023
@Siluial Hi! Sorry you're having trouble with the musician! I have a musician sim also and just tested this. The option to Write Jingle showed every time for me. Have you tried traveling to another lot? Sometimes this will clear glitches that may be happening in the background. You might also try exiting the game and running a repair. If you do that, I recommend allowing the repair to run for all packs, even if you get a prompt that the game is ready to play.
Also, there is an open bug report about the issue of losing progress for writing songs (and books and lyrics) here.
https://answers.ea.com/t5/Bug-Reports/OPEN-Write-Song-Book-Lyrics-Loses-Progress/m-p/11684183
Please click "me too" on the first post and feel free to share any comments that you feel are relevant.