changes to admin-function.php file lead to white screen

Hello. Just yesterday, like a total muppet, I made a change to my admin-functions.php file. I was trying to enter in some javascript command and realized that I wasn’t in the main functions.php folder only after it was too late. I saved the changes in the dashboard editor and tried to load the page, only to find that my page would no longer load (white screen).

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.

Sincerely,

lost for words.