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George WilliamsGeorge Williams 

Getting Errors in Lightning Experience Spring '17

Keep getting this error below in the App Manager panel and have been seeing werid behavior in other places.  Some apps I did for trailheads no longer function correctly either, some produce Aura.loadComponent(): Failed to initialize application errors while others are not displaying any data.

Uncaught TypeError: Cannot read property 'b' of null throws at

Aura.loadComponent(): Failed to initialize application. An internal server error has occurred Error ID: 1999217911-47099 (713029975)
Abhishek Sagar 1Abhishek Sagar 1
You need to share more details here.
George WilliamsGeorge Williams
I am getting these in a Spring 17 Dev edition.  Its actually anywhere in Lightning Exp. Setup and related pages/components.  Whenever there is a list it starts throwing dozens of the error messages indicated above when the mouse hovers over them.