1. Do you have a backup of everything from "before" you installed the addon? Backups make recovering from these kinds of things much easier.

2. Try re-uploading all the original versions of the /includes/auto_loaders/ and /includes/init_includes/ files, since the $template object is instantiated using those scripts. If you have extra files in those folders or their subfolders that weren't in the original Zen Cart files, remove them.

Of course, you should make backups even now before you go changing and deleting files.

Don't forget to also do database backups when you're doing backups of your PHP files. https://www.zen-cart.com/tutorials/i...hp?article=103