I have two dashboards that works perfectly previously suddenly doesn't work today. I saw "Selection required on one or more elements" in some of the elements of my dashboards. When I inspected the data expression behind these elements, it is obviously some wrong or old data expression. But the modified date of my dashbaord is last year. Also, when I click "configure" of some elements, my browser will freeze. I wonder what has happened. Is this due to some ESRI's updates on ArcGIS Dashboard?
