When LocalisationUpdate is run I get the following error:
[92b5ad9c1eec7433c835aa4d] [no req] Exception from line 27 of /var/www/extensions/LocalisationUpdate/fetcher/GitHubFetcher.php: Unable to get directory listing for wikimedia/mediawiki-skins-foreground Backtrace:
0 /var/www/extensions/LocalisationUpdate/Updater.php(117): LocalisationUpdate\GitHubFetcher->fetchDirectory(string) 1 /var/www/extensions/LocalisationUpdate/Updater.php(139): LocalisationUpdate\Updater->fetchFiles(LocalisationUpdate\FetcherFactory, string) 2 /var/www/extensions/LocalisationUpdate/update.php(62): LocalisationUpdate\Updater->execute(LocalisationUpdate\Finder, LocalisationUpdate\ReaderFactory, LocalisationUpdate\FetcherFactory, array) 3 /var/www/maintenance/doMaintenance.php(111): LU->execute() 4 /var/www/extensions/LocalisationUpdate/update.php(80): require_once(string) 5 {main}
The whole update should not fail in case some of the equivalent files cannot be found.