I get the Internal Server Error at this page:
https://beta.musicbrainz.org/artist/7f8cc833-b5a5-4358-a471-4ac2941f786a

but only when set to any non-english language (german for me).
This doesn't happen on other pages, even if these pages have wikipedia links and even if these pages have wikipedia links, but no german one.

I created a wikidata page today and attached it to the artist (might or might not be related).

The full ISE:

Caught exception in MusicBrainz::Server::Controller::Artist->show "Can't use string ("") as an ARRAY ref while "strict refs" in use at lib/MusicBrainz/Server/Data/WikipediaExtract.pm line 33, line 3."

Stack-Trace:

line 33 MusicBrainz::Server::Data::WikipediaExtract
line 49 MusicBrainz::Server::Controller::Role::WikipediaExtract
line 9 MusicBrainz::Server::Controller::Role::WikipediaExtract
line 332 MusicBrainz::Server
line 306 MusicBrainz::Server
line 333 MusicBrainz::Server
line 347 MusicBrainz::Server
line 392 MusicBrainz::Server

Anfragedaten:

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

Host: pino

Oberflächensprache: de

URL: https://beta.musicbrainz.org/artist/7f8cc833-b5a5-4358-a471-4ac2941f786a

EDIT:
This error is not dependant on language settings in the UI, see comments and another example below.