Hi, I just updated to MediaWiki 1.37 and get now the following error:
Use of User::getEffectiveGroups was deprecated in MediaWiki 1.35. [Called from MediaWiki\Extensions\Lockdown\Hooks::onGetUserPermissionsErrors in /var/www/html/extensions/Lockdown/src/Hooks.php at line 123] in /var/www/html/includes/debug/MWDebug.php on line 375
I think the code should be fixed here. I hope someone could help out.
Found that in the release Notes of MW 1.35:
The following methods of the User class are deprecated: getGroups, getGroupMemberships, getEffectiveGroups, getAutomaticGroups, addGroup, removeGroup, getFormerGroups, getAllGroups, getImplicitGroups, addAutopromoteOnceGroups. Use the new UserGroupManager service instead.
So I would say, the Extension is not supported for MW 1.37. Hopefully someone will fix that. I am using the extension for so long without any trouble.
Have you upgraded your extension to the newest version? I viewed the commit history and saw one commit fixing it.
I encountered the same problem when using Lockdown from the REL1_37 branch. The commit fixing this issue is only in the master branch right now. Ideally the fix would be merged into REL1_37 so users of Mediawiki 1.37 won't have to choose the master (development) branch.