About the game crashing in the attract mode.
The answer is, Yes, the game is looking for a song to display as a demo. Sadly like most of the people (me included) we have removed the "limited" tag from the musicdb to have everysong. This means the game WILL SEARCH for this song to display. So you can remove every "limited" tag from the musicdb except for "siru" and "roki" it could possibly fix your issue 👍 (just leave the "limited" tag to 1)
This can be fixed in many ways tho
Another solution is that someone could leak a japanese dump including the songs officialy 😅 yes please