Node red dashboard not loading after a couple of days

Hi, Every couple of days Node Red becomes unloadable and displays the screen below.


The page is really poor design as it tells me zero information about what the problem is!
Clicking the reload button does nothing. If however i copy the url to another browser the node red dashboard does load. So why does it stop loading in the first browser? The browsers are safari and chrome running on IOS. I get the issue with both browsers. If I go to the node red flows page. The browser does then reload the dashboard. But that is not a very good workaround for end users.