I installed the library, when I tried to do python manage.py runserver appear this error.
Same here!
Did you add 'django_celery_beat', to the INSTALLED_APPS in your Django app's settings.py?
I think this should be in the documentation for setup, the error message having to do with SolarSchedule doesn't really make it clear that this is the solution.
Seen this error a dozen times and it always confuses me. This should fail more explicitly.
Most helpful comment
Did you add
'django_celery_beat',to theINSTALLED_APPSin your Django app'ssettings.py?