To solve this issue, I tried just restoring the file with a backup that I had, but this didn't work. I also contacted my host and asked them if they could restore my site's files (i.e. everything in the public directory) as of a couple of days before the issue. This didn't work either. Now, my mind is beyond puzzled - I don't understand how restoring all of my sites files to before the issue occurred does not fix the problem.
At this point, I would settle just just reinstalling wordpress and starting from fresh, but I'm not even sure how to do that.
I could desperately use some guidance.
lost for words.