I have created a web application using ArcGIS online (web app builder) and have shared it within my organisation for other people to view the map. One user seems to be having problems viewing the map, he gets a message listing all the layers on the map and saying they cannot be added to the map. He is using Chrome and other people are able to view the map without any problems. The map is basically a boundary viewer with lots of different layers which the user can switch on and off using the tick boxes. There are around 16 layers on the map. Does anyone have any advice? many thanks