API error responses generated by AbuseFilter and SpamBlacklist have changed, as announced here: https://lists.wikimedia.org/pipermail/mediawiki-api-announce/2019-September/000148.html (relevant task: T229539).
It appears you have special handling for the old responses. This only affects unit tests (so they are probably failing now):
extensions/Jade/tests/phpunit/AbuseFilter/AbuseFilterTest.php: 73: 'action' => 'abusefiltercheckmatch', 78: $this->assertTrue( $result[0]['abusefiltercheckmatch']['result'] ); extensions/Jade/tests/phpunit/SpamBlacklist/SpamBlacklistTest.php: 87: 'spamblacklist' => 'unusual-stringy',