A New Perspective on Client Health in ConfigMgr Technical Preview 1901

I am really stuck.  Office 365 rolled out an update today.  My ToDoView is now completely blank.  This makes it impossible to work with my tasks and data.  I understand there is a five-hour wait for assistance.  Can I not simply roll back to the previous release so I can get on with my day.  

I report this bug on early release testing.  Rolled my version back to the current version.  And now two weeks later, I back in the same problem.

Can someone help?  I am stuck and I still have full three days of work in front of me and NO ToDo list organized to accommodate work business workflows.