Upgrade issue 5.1.2 -> 5.1.4 patch 2 -> 5.1.5

[[GReY]]

I went through the upgrade process for the site, and I now recieve this error in debug mode when logging in:

Error :Non-existent template requested: preheader on line 222 in /home/greyonli/public_html/members/includes/vb5/template/cache.php
Step 0: showErrorPage() called on line 193 in /home/greyonli/public_html/members/includes/vb5/applicationabstract.php 
Step 1: handleException() called 
Exception Non-existent template requested: preheader on line 222 in /home/greyonli/public_html/members/includes/vb5/template/cache.php

I'm really stumped as to what to do to fix this, as I've cleared my cache, attempted to use other templates, and used most of the maintenance utilities.

What happened and how can I fix it?


thanks for any help