wp-admin Error 404 – Not Found

I am unable to login to my website admin sloanproductions.com/wp-adminI now get an Error 404 – Not Found, originally I got Fatal error: Allowed memory size of 33554432 bytes exhausted (tried to allocate 30720 bytes) in/home/bobsloan/public_html/wp-includes/class-simplepie.php on line 13382 but it has now changed to the basic 404- not found.

I had a previous testing version on another site, which was still working sloan.ihostnet.com, I changed the current wp-admin to xwp-admin as well as xwp-includes and xwp-load (because they were dependent files) and then uploaded the the files from the testing to real server, but no luck. I also tried setting the logout to false which did bring me up a login page(no css) but when I logged in I just the 404 error again.

I’ve looked through the posts here to no avail, any help would be GREATLY APPRECIATED