I'm now getting a bunch of errors which include errors like

Caught exception in MusicBrainz::Server::Controller::WS::2::Release->root "Wide character in subroutine entry at local/lib/perl5/Catalyst/Authentication/Credential/HTTP.pm line 186, <GEN52> line 1."

Caught exception in MusicBrainz::Server::Controller::WS::2::Release->release "Can't call method "id" on an undefined value at lib/MusicBrainz/Server/ControllerBase/WS/2.pm line 276, <GEN52> line 3."

or

Caught exception in MusicBrainz::Server::Controller::WS::2::Artist->root "Wide character in subroutine entry at local/lib/perl5/Catalyst/Authentication/Credential/HTTP.pm line 186, <GEN12> line 1."

Caught exception in MusicBrainz::Server::Controller::WS::2::Artist->artist "Can't call method "id" on an undefined value at lib/MusicBrainz/Server/ControllerBase/WS/2.pm line 239, <GEN12> line 1."

Possibly something to do with non-ASCII characters in passwords?