I added several “Button” component with no text and an Icon selected from the library provided by ignition. I’m having the same warning with all of them. This time it didn’t dissappear after restarting the gateway.
This elements are inside a repeater, if this helps tracking down the issue.
Sorry for the confusion. It’s something we changed with icon cacheing in 8.3 to allow icons to work with Perspective’s offline mode. It’s nothing that you did, or can do. It shouldn’t affect the rendering of any icons in your project, but please let us know if it does.