Fix Django Admin Error

I'm encountering a persistent error on the Django admin interface. The error occurs every time I try to access a specific page.

Error Details:
- TemplateSyntaxError at /admin/pages/page/
- Caught AttributeError while rendering: 'NoneType' object has no attribute '_meta'

I'm looking for an experienced Django developer who can troubleshoot and resolve this issue. Ideal skills and experience include:
- Proficiency in Django and its admin interface
- Strong debugging skills
- Familiarity with TemplateSyntaxError and AttributeError in Django

Please provide your approach to fix this issue and any relevant experience.