I installed Concrete CMS 9.1.3 locally on Ubuntu 22.10 (php version 8.1.7-1ubuntu3) with the Atomik framework. When I tried to to delete the “social block” I got an error about displayOrder not being declared (concrete/blocks/social_links/controller.php line 115).
I also have also recently seen this error. It also occurs if you try to add margin and padding spacing via the design and templating menu. My work around was to clear the system cache and refresh the page.