The error "Index was outside the bounds of the array" occurs when the "Imagery" data type is selected. If I deselect Imagery we are good to go. I can have all other data types selected.
This error displays because there's currently an issue with our service. Please refer to: http://communities.bentley.com/products/road___site_design/f/343493/t/128127
You can get the imagery and OpenStreetMap data. However, the terrain data cannot be retrieve.