Brandon,
Sorry for the trouble. We'll look into the best fix for that issue. For now tough, please edit that file on your site. At line 20, you'll see:
if (!JFile::exists($libFile))
Change it like below, by adding the top line:
jimport('joomla.filesystem.file');
if (!JFile::exists($libFile))
Let us know how that goes, and sorry for the trouble,
Alex