Swapping Notebooks load problem

[Mark Durre 0]

When swapping between notebooks, i sometimes get the error "Sorry, we’re having some trouble.Try reloading the page" with this screen. Clicking on the button works - but this is happening about 1/2 the time swapping notebooks. I am on the latest version v10.5.7 build 2171 public on Mac with OS 10.15.7 and it just stated after I installed the this version