I was able to solve the problem (more or less).

Simply reinstalling PyCharm was not enough to fix the issue. What worked in the end was completely removing all PyCharm-related files. I copied my project files into Notepad first so I wouldn’t lose them, then re-added them after reinstalling.

Fortunately, I had only been using PyCharm for a couple of days, so I didn’t have too much saved. After clearing everything out, the reinstallation finally worked.

I’m not sure why it was necessary to erase all the files, but this is what solved the problem for me. I'm not deleting the question, in case it helps someone else who runs into the same situation(and simply reinstalling PyCharm does not help them).