When I export icons as iconfont, the font files are not generated and the demo renders a Null message. How do I fix this?

This issue was caused by the app not assigning IDs properly to the icons when they were added to a project. If two or more icons have the same ID, the icon font export does not work, the font files are not generated and the demo file renders a "Null" message.

This issue has been fixed in version 2.3.0.

However, the projects created before version 2.3.0 are still affected by the issue. A trick to fix this is to select all icons in a project (make sure all icons have been loaded - scroll down - then press Cmd+A on Mac, Ctrl+A on Windows), then right-click to trigger the context menu and add the icons to a new project.

The app will assign new IDs to the icons, and the icon font export will work fine for the new project.