python - Server error 500 instead of appending slash django when debug=false -

on production server 500 server error when access /visitors url. use django 1.8 nginx.

i think django should append slash @ end , show me actual page. if access /visitors/ works fine.

when debug set true works fine.

i don't have error in error.log , access log is: (sorry picture, reason not able copy/paste on server).

i not serveradmin don't know files relevant in errors 1 let me know need , paste here.

edit:

settings.py

# ... other settings deleted  middleware_classes = (     'django.contrib.sessions.middleware.sessionmiddleware',     'django.middleware.common.commonmiddleware',     'django.middleware.csrf.csrfviewmiddleware',     'django.contrib.auth.middleware.authenticationmiddleware',     'django.contrib.auth.middleware.sessionauthenticationmiddleware',     'django.contrib.messages.middleware.messagemiddleware',     'django.middleware.clickjacking.xframeoptionsmiddleware',     'django.middleware.security.securitymiddleware',     'ea.logs_middleware.logsmiddleware',     'ea.custom_login_middleware.firstloginmiddleware',     'ea.profiler_middleware.profilemiddleware', )   wsgi_application = 'ea.wsgi.application' 

i don't modified append_slash , event if add append_slash=true doesn't work.

edit2

from django.conf.urls import include, url django.contrib import admin  urlpatterns = [     url(r'^visitors/$', views.how_it_works, name='visitors'),      # ... ]