The current path, gantt/gantt/, didn't match any of these.
2021. 1. 16. 12:03ㆍ파이썬/Django
urls.py
urlpatterns = [
path('gantt', views.gantt, name='gantt'),
]
'gantt' -> 'gantt/'로 변경하면 해결
path('gantt/', views.gantt, name='gantt'),