SystemCheckError: System check identified some issues:

ERRORS:
?: (urls.E004) Your URL pattern 'two_factor' is invalid. Ensure that urlpatterns is a list of url() instances.
        HINT: Try removing the string 'two_factor'. The list of urlpatterns should not have a prefix string as the first element.
?: (urls.E004) Your URL pattern 'two_factor' is invalid. Ensure that urlpatterns is a list of url() instances.
        HINT: Try removing the string 'two_factor'. The list of urlpatterns should not have a prefix string as the first element.
?: (urls.E004) Your URL pattern 'two_factor' is invalid. Ensure that urlpatterns is a list of url() instances.
        HINT: Try removing the string 'two_factor'. The list of urlpatterns should not have a prefix string as the first element.
?: (urls.E004) Your URL pattern [<RegexURLPattern login ^account/login/$>, <RegexURLPattern setup ^account/two_factor/setup/$>, <RegexURLPattern qr ^account/two_factor/qrcode/$>, <RegexURLPattern setup_complete ^account/two_factor/setup/complete/$>, <RegexURLPattern backup_tokens ^account/two_factor/backup/tokens/$>, <RegexURLPattern phone_create ^account/two_factor/backup/phone/register/$>, <RegexURLPattern phone_delete ^account/two_factor/backup/phone/unregister/(?P<pk>\d+)/$>, <RegexURLPattern profile ^account/two_factor/$>, <RegexURLPattern disable ^account/two_factor/disable/$>] is invalid. Ensure that urlpatterns is a list of url() instances.
?: (urls.E004) Your URL pattern [<RegexURLPattern login ^account/login/$>, <RegexURLPattern setup ^account/two_factor/setup/$>, <RegexURLPattern qr ^account/two_factor/qrcode/$>, <RegexURLPattern setup_complete ^account/two_factor/setup/complete/$>, <RegexURLPattern backup_tokens ^account/two_factor/backup/tokens/$>, <RegexURLPattern phone_create ^account/two_factor/backup/phone/register/$>, <RegexURLPattern phone_delete ^account/two_factor/backup/phone/unregister/(?P<pk>\d+)/$>, <RegexURLPattern profile ^account/two_factor/$>, <RegexURLPattern disable ^account/two_factor/disable/$>] is invalid. Ensure that urlpatterns is a list of url() instances.
?: (urls.E004) Your URL pattern [<RegexURLPattern login ^account/login/$>, <RegexURLPattern setup ^account/two_factor/setup/$>, <RegexURLPattern qr ^account/two_factor/qrcode/$>, <RegexURLPattern setup_complete ^account/two_factor/setup/complete/$>, <RegexURLPattern backup_tokens ^account/two_factor/backup/tokens/$>, <RegexURLPattern phone_create ^account/two_factor/backup/phone/register/$>, <RegexURLPattern phone_delete ^account/two_factor/backup/phone/unregister/(?P<pk>\d+)/$>, <RegexURLPattern profile ^account/two_factor/$>, <RegexURLPattern disable ^account/two_factor/disable/$>] is invalid. Ensure that urlpatterns is a list of url() instances.

WARNINGS:
?: (urls.W005) URL namespace 'contest:oioioiadmin' isn't unique. You may not be able to reverse all URLs in this namespace