All day I`ve been trying to add a variety of releases using the "Add cluster as a release" plugin in Picard, but every time I get this error*

*When I try to do the above using the beta version of the musicbrainz site, I don`t get the error, but the fields on the add release page are not auto-filled & remain empty

Error:

Caught exception in MusicBrainz::Server::Controller::ReleaseEditor::Add->add "Not an ARRAY reference at lib/MusicBrainz/Server/Wizard/ReleaseEditor.pm line 1627, line 17."
Stack trace:
line 1627 MusicBrainz::Server::Wizard::ReleaseEditor
line 314 MusicBrainz::Server::Wizard
line 131 MusicBrainz::Server::Wizard
line 93 MusicBrainz::Server::Wizard::ReleaseEditor
line 23 MusicBrainz::Server::Controller::ReleaseEditor::Add
line 321 MusicBrainz::Server
line 296 MusicBrainz::Server
line 322 MusicBrainz::Server
line 336 MusicBrainz::Server
line 381 MusicBrainz::Server
Request data:

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

{ 'mediums.-1.track.14.name' => 'Too Big To Fail', 'mediums.-1.track.3.name' => 'Escapes', 'mediums.-1.track.13.length' => '212793', 'mediums.-1.track.5.length' => '387944', 'mediums.-1.track.1.name' => 'Dark Times', 'mediums.-1.track.8.name' => 'Void', 'mediums.-1.track.4.length' => '280293', 'mediums.-1.track.11.length' => '212610', 'name' => 'Documentary: 2008/2012', 'mediums.-1.track.8.length' => '264855', 'mediums.-1.track.12.name' => 'Fear For The Futre', 'mediums.-1.track.10.length' => '207386', 'mediums.-1.track.0.length' => '273371', 'mediums.-1.track.2.length' => '251324', 'mediums.-1.track.10.name' => 'Tomorrow For Us', 'mediums.-1.track.7.length' => '245159', 'mediums.-1.track.6.name' => 'Children Of The Poor', 'mediums.-1.track.16.name' => 'Low', 'mediums.-1.track.2.name' => 'Making A Bomb', 'mediums.-1.track.9.length' => '559699', 'mediums.-1.track.0.name' => 'What Is The Point?', 'mediums.-1.track.9.name' => 'Last Day', 'mediums.-1.track.15.length' => '305946', 'mediums.-1.track.12.length' => '208378', 'mediums.-1.track.5.name' => 'Drowning', 'mediums.-1.track.14.length' => '225854', 'mediums.-1.track.4.name' => 'Downplay', 'mediums.-1.track.16.length' => '245681', 'mediums.-1.track.1.length' => '287294', 'mediums.-1.track.6.length' => '260284', 'mediums.-1.track.11.name' => 'Five One One', 'mediums.-1.track.15.name' => 'Preoccupied', 'mediums.-1.track.7.name' => 'People', 'mediums.-1.track.13.name' => 'Say What We Mean', 'mediums.-1.track.3.length' => '208822', 'artist_credit.names.0.artist.name' => 'Miserylab' }

};

Host: pingu

URL: http://musicbrainz.org/release/add