I just updated my wiki to 1.40 and downloaded the newest version of Lockdown in the process. I am getting an error:
Fatal error: Uncaught ExtensionDependencyError: Lockdown is not compatible with the current MediaWiki core (version 1.40.0), it requires: >= 1.41.0. in /home/<mywikidir>/includes/registration/ExtensionRegistry.php:438 Stack trace: #0 /home/<mywikidir>/includes/registration/ExtensionRegistry.php(282): ExtensionRegistry->readFromQueue(Array) #1 /home/<mywikidir>/includes/Setup.php(282): ExtensionRegistry->loadFromQueue() #2 /home/<mywikidir>/includes/WebStart.php(92): require_once('/home/xxx/w...') #3 /home/<mywikidir>/index.php(44): require('/home/xxx/w...') #4 {main} thrown in /home/<mywikidir>/includes/registration/ExtensionRegistry.php on line 438