Cannot access Configuration Management/VM reports - undefined method `id' for nil:NilClass [report/tree_autoload]

Issue

• I'm getting a UI error in trying to access reports in the following categories;
  Configuration Management/VMs
  Configuration Management/Hosts
  Configuration Management/Management Systems
  Events/Operations
  Events/Policy
  Performance by Asset Type/VMs

• Here's the UI error displayed to the user.

Unexpected error encountered
Errors in Management Engine can be caused by:
① Accessing Management Engine from multiple tabs or windows of the same browser on a single machine.
      Close any duplicate browser sessions, then select a menu option above.
② Pressing the back button during a session.
      Close any duplicate browser sessions, then select a menu option above.
③ An internal system error.
      Please contact your administrator for assistance.
Error text:
undefined method `id' for nil:NilClass [report/tree_autoload]
end error -------------------------