INSTALLED_APPS = [
'django.contrib.admin',
'django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.messages',
'django.contrib.staticfiles',
'first_app']

Unhandled exception in thread started by <function check_errors.<locals>.wrapper at 0x7fe13745f6a8>
...
ImportError: No module named 'first_app'