The CheckUser extension CI for MediaWiki release 1.44 is blocked with the following error:
22:58:03 [4d6ad0af7dcdf758bdf31d08] [no req] Error: Class "Pimple\Container" not found
22:58:03 Backtrace:
22:58:03 from /workspace/src/extensions/Flow/includes/Container.php(5)
22:58:03 #0 /workspace/src/includes/AutoLoader.php(226): require_once()
22:58:03 #1 /workspace/src/extensions/Flow/maintenance/FlowSetUserIp.php(41): AutoLoader::autoload()
22:58:03 #2 /workspace/src/maintenance/includes/LoggedUpdateMaintenance.php(52): Flow\Maintenance\FlowSetUserIp->doDBUpdates()
22:58:03 #3 /workspace/src/maintenance/update.php(210): MediaWiki\Maintenance\LoggedUpdateMaintenance->execute()
22:58:03 #4 /workspace/src/maintenance/includes/MaintenanceRunner.php(694): UpdateMediaWiki->execute()
22:58:03 #5 /workspace/src/maintenance/doMaintenance.php(100): MediaWiki\Maintenance\MaintenanceRunner->run()
22:58:03 #6 /workspace/src/maintenance/update.php(311): require_once(string)
22:58:03 #7 {main}
22:58:03 <<< Finish: Install MediaWiki, db=<MySQL /workspace/db/quibble-mysql-5_tnm0fp/socket>, in 3.313 s