XF 1.3 Error on fresh install of 1.3

I have installed Xenforo on the same host but have decided to use my license for another site literally one directory over. I also decided to start with a fresh install rather than retain my old data. I completely deleted the old installation, changed my license to reflect the new url and created a new database for the new installation.

Everything seems to install fine but when I get to the part about logging in to the admin panel I get this error:

Fatal error: Class 'XenForo_Session' not found in /path-to-my-directory/forums/library/XenForo/Controller.php on line 291

I have started over several times including completely dropping the old database and creating a new one. I get this error every time no matter what I do.
I found the issue. For some reason the library/Xenforo/session.php file was not copied over correctly. As soon as I placed it in there, everything seems to be working fine now. I am making sure nothing else was missed.