Hi RobertT4373 ,
I am very sorry to hear this is giving you trouble. Can you explain more about what is happening? Are you seeing any errors on the page or a white page behind the left toolbar? If possible, a screenshot of how this looks would be very helpful!
Also, what browser/version are you working in when this happens? If possible, a good test would be to try this in another browser to see if you can replicate there.
Thanks for posting,