If you're on Windows 10, try renaming this folder(C:\Users\[your user name]\AppData\Roaming\RenPy) or move it somewhere else and retry the game. Renpy may has some residue files that are not compatible between versions.
In chapter 7, background music is Guzheng cover of a song from the 1986 Chinese TV series Journey to the West, performed by Carol Chang. The song actually tells a story of forbidden affection and heartbreaking parting between a monk and a queen.
