In the process of moving a discID to a new release and basing the new release off the release that the discID is being transferred from the error occurred. There was one discID associated with the release and this move was the final discID leaving zero discID's on the release. See below for stacktrace/output.

"Internal Server Error
Oops, something went wrong!

Error:

Caught exception in MusicBrainz::Server::Controller::ReleaseEditor::Add->add "must provide json to convert at lib/MusicBrainz/Server/Wizard/ReleaseEditor/Add.pm line 132"
Stack trace:
line 132 MusicBrainz::Server::Wizard::ReleaseEditor::Add
line 165 MusicBrainz::Server::Wizard::ReleaseEditor::Add
line 390 MusicBrainz::Server::Wizard
line 132 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' => {
'duplicate_id' => '67044',
'wizard_page_id' => '1',
'next' => "Next \x

",
'wizard_session_id' => '39214'
}
};

Host: lolo

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