I have a problem with my Zen Cart - I am using v1.3.9h. I recently added the mod - Newsletter_subscriber_2_2_2. Now the list of customers does not show up in my admin section. They are in the database. The error log shows the following error: PHP Fatal error: Cannot redeclare class base in /home/content/26/3552326/html/bestautostuff.com/includes/classes/class.base.php on line 17. I have added the COWOA mod in the past but carefully integrated the new mod into the core files. Can anyone help?
Thank you.