SpriteFont issue on Win10

The content builder is failing to process my SpriteFont. Any ideas?

Building Font C:\GameDev\Win10\Bopscotch-Editor\Level Editor\Level Editor\Level EditorContent\Font\Komica Axis
System.Exception: Could not load C:\GameDev\Win10\Bopscotch-Editor\Level Editor\Level Editor\Level EditorContent\Font\Komica Axis
   at Microsoft.Xna.Framework.Content.Pipeline.Processors.FontDescriptionProcessor.Process(FontDescription input, ContentProcessorContext context)
C:/GameDev/Win10/Bopscotch-Editor/UAP Editor/UAP Editor/Content/../../../../Bopscotch-Editor/Level Editor/Level Editor/Level EditorContent/Font/Komika Axis.spritefont: error: Index was out of range. Must be non-negative and less than the size of the collection.
Parameter name: index

The spritefont file does exist at that location (I used the tool’s own file open dialog to add it), and I do have the corresponding font installed on the system.

User error. Spelt the name of the font incorrectly inside the SpriteFont file.