Log-In screen is blank

I enabled Multisite today, probably a bit too hastily, and didn’t like the way my site was behaving. (I was instructed to move my core files into the root, which I did). I decided that I didn’t really need to stick with multisite, so I (thought I) followed the directions for disabling it, but apparently not.

My database has been cleared of all the additional info that the multisite process created. All the post info appears to be intact.

All my files are back in the subfolder that they started in /wp/

When I try to log-in in the normal fashion, the php returns a blank page. Additionally, the files in the /wp/ subfolder show up if I point to that directory.

Site
Subfolder