I have verified the screen-shot shared and initial root cause could be CSS associated with the rule form were missing from the database. As expected, there should be 3-4 CSS files generated which could be observed in the developer tool of browser as well but in your case, there could be only one available. Like this:-
Re-generation of CSS is necessitated alongwith reassembling of skin rule. I would've recommended "Revalidate and Save" but it couldn't be done for OOTB rules. It's a process equivalent to explicitly performing opening of a rule and saving. While saving every rules go through a validation as well.
I tried doing the same. My Application was referring to AppSkin Skin rule and i gave its pzInsKey as parameter in the said activity. But it Didnt Work. It will be helpful if you can give any other suggestion.