Internal server error displaying track 404 page

https://musicbrainz.org/track/075d1761-ec7c-4688-826a-6697de025a40 gives

Oops, something went wrong!

Error:

Couldn't render template "file error - track/not_found.tt: not found"

Stack trace:
line 19 MusicBrainz::Server::View::Default
line 330 MusicBrainz::Server
line 304 MusicBrainz::Server
line 331 MusicBrainz::Server
line 345 MusicBrainz::Server
line 390 MusicBrainz::Server

Request data:
$VAR1 = {
'query_parameters' => {},
'body_parameters' => {}
};

Host: astro

URL: https://musicbrainz.org/track/075d1761-ec7c-4688-826a-6697de025a40