It looks like either your APTL or vBulletin files have been corrupted or you have a security breach on your forum, as that is not normal output from our files or from vBulletin.
Please download APTL and vBulletin fresh from DBTech and vBulletin.com, and re-upload all files without modifying them, then try again.
The importer will skip already imported items when you re-run it later.