I'm running into an error when I attempt to generate cache tiles. If I use a shapefile as an area of interest polygon, then the tile generation doesn't proceed and the status is reported as "Error". See screenshot. If I don't use an area of interest polygon and instead just use an extent, then it works. I'm new to this process so it could be that I'm not using the area of interest polygon properly. I have one polygon that is the full boundary of all my orthophoto tiles, an irregular shape. But I don't understand the problem. I'm using version 10.3.1
