I was having the same problem. What fixed it for me was deleting the folder at C:\Users\$username\AppData\Local\wandersong. The next time I ran wandersong.exe it loaded up fine.
This finally works! If you don't understand go to the search bar and type "run". You then type the above line into the run box and delete the folder it takes you to.
Hey I don't know if you will respond or not, but I deleted the folder, and every time I enter the game it creates the folder so I can't enter the game. Any fixes?
Edit: It keeps asking me for a palette name. I run Windows 11
Never mind I just re loaded it and I did all the steps perfectly and it works now. I was deleting the right folder, it just kept getting created as I started the game.
