reproduce:
seems related to: https://gerrit.wikimedia.org/r/#/c/316226/
log error:
{"id":"WBD7xApAIEAAADA-fP0AAAFQ","type":"BadMethodCallException","file":"/srv/mediawiki/php-1.28.0-wmf.23/extensions/GlobalBlocking/includes/api/ApiQueryGlobalBlocks.php","line":98,"message":"Call to a member function buildLike() on a non-object (null)","