MediaWiki version: n/a
Uncaught Psr\Log\InvalidArgumentException: Level "400" is not defined, use one of: 0, 1, 2 in /srv/mediawiki/php-1.36.0-wmf.2/vendor/monolog/monolog/src/Monolog/Logger.php:516
A couple of these just happened. I don't understand the code, but it seems like a programming error to me. If these start happening a lot, they may become a train blocker. Would appreciate triage.