Quote Originally Posted by mc12345678 View Post
If you changed templates, then you will need to carry over applicable override files. (Reinstall, copy, follow the documentation, etc.) A number of ways to get there, depending on your experience and capability. I would routinely just identify which files existed in the old template that should exist in the new template (ie I installed them) and copy them over to the new template. Also see the overide directory postings in the forum/FAQ. The above are suggestions, incorrectly applying them could cause harm to your site, Backup, backup, backup and test before using on your live site.
This is the likely culprit.. (all the template overrides were not copied over..)