My first guess, since it is loading the players image, is that it's an issue with the filepath being too long. The easiest way to test that would be to move the game folder to your desktop, and try running it from there. If that works, you just have to change where you are putting the game, or shorten the names of the folders it's inside until it works. Otherwise it could be some sort of permissions issue. To help you with that, I would need to know your operating system.
Hmm, I haven't seen that particular error before, but we can always try the usual solutions for Mac issues. When you say you weren't putting in the folder properly, do you mean the game wasn't in your applications folder? Because that's another potential cause of issues. Basically the first thing to try with bugs on a Mac is permission issues, so moving the game to the applications folder can help, as can editing the game folder and ensuring it has read/write privileges. Let me know if that helps at all.
This link should explain it better than I could. https://support.apple.com/sl-si/guide/mac-help/mchlp1203/mac