Quote Originally Posted by noppie View Post
PHP Fatal error: Uncaught Error: Call to a member function add() on null in /includes/init_includes/overrides/init_sessions.php:15
$breadcrumb->add(HEADER_TITLE_CATALOG, zen_href_link(FILENAME_DEFAULT)); line 15 of init_sessions.php
That means $breadcrumb hasn't been initialized/created yet, which is expected because init_sessions loads at order 70 whereas breadcrumbs at 160.

I'm not sure why line 15 of your init_sessions would be setting a breadcrumb yet.