I often see the message 'A server error has occurred' appear in a pop-up window. Most often it pops up when I click on a link that takes me to another Mango page, but sometimes it occurs on its own, when I have not done anything on the page. Most often I see it on a graphics page, but that's probably because that's the page I have open most often.
I often get on the data_point_edit.shtm page and the events.shtm page, but that is not in a pop-up window, and looks quite different:
Thanks for your help.