EDITED for more info:
Hello! Can you try to fully remove the game from your PC and re-download, then re-unzip the game files? **This includes removing any previous versions of the game**
A coder friend confirmed that "rv" is something from the back end of Renpy. It's possible that one of the renpy engine files is missing or corrupted.
I've identified that this is may be relating to Renpy's in-built rollback/rollforward feature. Can you give me a few more details?
- are you attempting to roll back or roll forward using either your mouse wheel or the page up/page down buttons
- is the crash happening before or after you input a player name
I still think that it's possible there's something wrong with your build of the game - such as a file corruption that happened during the game download. And right now the only thing I can suggest is still try to fully remove everything from the game off your PC and re-download. If you are using the Itch.io launcher, this may include going into your app data and removing the folder from there.
Let me know if that helps.
~Esh