After upgrade, System Status page is empty, but issues display in popup
Well, I'm not sure this is a long-term solution, but it is a workaround....

In one of the Angular posts (Status page angular load error) I found this:


  another work-around should be going to "Administer => System Settings => Debugging" and disabling the "Asset Cache"


That's brought my System Status page back, but I don't like the thought of not using a performance enhancement.