A number of "Undefined Property" errors/notices

I am currently trying to add a “Page List” block and am handed one “Undefined Property” after another. This happened in other places as well, not just blocks. An example:

Undefined property: Concrete\Block\PageList\Controller::$displaySystemPages

I can easily fix it with appropriate isset() or property_exists() lines in the code. But I assume that with some update in the future my edits will disappear again. As an encouragement for the devs: please declare all object properties before accessing them. :innocent:

And in the end: is there a more appropriate place to post such messages? :slight_smile:

Adding a user. There is another one:

Undefined array key "uDefaultLanguage"

And another one (Dashboard/Members/User Groups/Send Message to Group):

Undefined variable $subject