I can't get into admin after the upgrade. All white screen. in the logs folder I have the follow error

015 09:46:35 America/Chicago] PHP Fatal error: Class 'tableBlock' not found in /home/e4mpdnk7/public_html/xxx/includes/classes/box.php on line 27

What is supposed to be there? I have checked the new 1.54 zencart, the test store and they all show that area blank.

class box extends tableBlock {
function box() {
$this->heading = array();
$this->contents = array();
}