Quote Originally Posted by Coop1979 View Post
Someone can feel free to correct me if I'm wrong, but I believe Zen-Cart 1.3.8a breaks the Multi-Site module if you are simply over-writing files from the base ZC installation with the "Modify" files from Multi-Site. Specifically, includes/functions/functions_categories.php has some major code changes when you compare the version included in ZC 1.3.8a and the one in Multi-Site. If you re-upload the includes/functions/functions_categories.php file from the base ZC 1.3.8a, it should work, but you can't exclude categories from showing up on your Multi-sites.

I have isolated my problem to this issue identified by Coop1979. As soon as I upload the multi-site 'functions_categories.php' my site (1.3.8a) dies. No page loads fully. Has anyone resolved this issue? Is there a workaround?