The problem is that you're using this plugin https://github.com/django-blog-zinnia/cmsplugin-zinnia which reset admin page here if you're set cmsplugin_zinnia.placeholder.EntryPlaceholder as ENTRY_BASE_MODEL.
As you see this code cuts the original fieldset and remove content field:
The problem is that you're using this plugin
https://github.com/django-blog-zinnia/cmsplugin-zinniawhich reset admin page here if you're setcmsplugin_zinnia.placeholder.EntryPlaceholderasENTRY_BASE_MODEL.As you see this code cuts the original fieldset and remove
contentfield:So I see only one solution is to set another model as
ENTRY_BASE_MODELwhich you need to create:And finally set correct
settings.pyI hope this will help you :)
Note
I digged out why the hell they reset
fieldsetthe original admin. This is explained here.