I got an email with my subscribed artists' edits, clicked on one of the links, logged in and got the following error:

Internal Server Error
Oops, something went wrong!

Error:

Caught exception in MusicBrainz::Server::Controller::Artist->edits "Can't call method "id" on an undefined value at lib/MusicBrainz/Server/Data/Utils.pm line 410, line 3."
Stack trace:
line 410 MusicBrainz::Server::Data::Utils
line 30 MusicBrainz::Server::Data::ReleaseGroupSecondaryType
line 31 MusicBrainz::Server::Data::ReleaseGroupType
line 543 MusicBrainz::Server::Data::Edit
line 65 MusicBrainz::Server::Controller::Role::EditListing
line 18 MusicBrainz::Server::Controller::Role::EditListing
line 332 MusicBrainz::Server
line 306 MusicBrainz::Server
line 333 MusicBrainz::Server
line 347 MusicBrainz::Server
line 392 MusicBrainz::Server
Request data:

$VAR1 = {
'query_parameters' => {},
'body_parameters' =>

{ 'password' => 'qwertz2008', 'remember_me' => '1', 'username' => 'sg-lecram' }

};

Host: pingu

URL: https://musicbrainz.org/artist/00a9f935-ba93-4fc8-a33a-993abe9c936b/edits

I retried (by refreshing the page) several times within the following minutes but the error seems to persist.

PS: Do not waste your time trying the password, it won't work.