OAuth token expiration ISE

Exception: Error: Can't locate object method "now" via package "Moose::Meta::TypeConstraint"

This happens at line 106 of Entity::EditorOAuthToken, and the reason it's happening is that the top of the file has:

use DateTime;
<...>
use MusicBrainz::Server::Types qw( DateTime );

Which means that it fails trying to compare with DateTime->now.