Hey there,
Sorry for the inconvenience.
Please try to verify the Integrity of the Game Files.
- Please right-click Party Animals in the Steam library and open ''Properties''.
- Then click ''Verify the file integrity'' in ''Files installed'' and wait for it to finish.
- It will work after verifying.
If the issue persists, please uninstall and reinstall the game, then restart Steam.
Thanks for your support and patience!