Thanks for answering!
I'm new to Ren'py, so maybe that's why I'm having this issue. What exactly do I do with CSP and PSD files? Do I need them?
I got the list of errors while putting them in the GUI folder, but I wasn't sure where else to put them.
When I get rid of them there's some sort of glitch where, in the script, the lines aren't... correct? I'm not sure, it keeps putting new error on top of new error and it glitches between them, I can't exactly read it.