TemplateSyntaxError at /admin/site_content/sitepage/add/
'grp_tags' is not a valid tag library: Template library grp_tags not found, tried django.templatetags.grp_tags,django.contrib.admin.templatetags.grp_tags,django.contrib.staticfiles.templatetags.grp_tags,lyrical.site_content.templatetags.grp_tags
It would appear that lyrical_page required django-grappelli in order to render this admin template, but does not require django-grappelli during install.
I would personally vote for not requiring it, if possible, but if it is necessary then it should be added to the setup.py and a requirements.txt