Problem
When you open the feature sets in your Web Client, the expected feature set image icons are replaced by question marks.
Solution
Web Client uses the SVG file format for the feature set images. If you previously used any customized feature set images in PNG format, they must be changed to SVG format. For more information, see Modify a feature set.
Additionally, the directory location of the feature set images for any Web Client sites has been changed. For example, any feature set images must be saved to [Web Client Site] > SDAClientServices > bin > Release > content > images > icons.