Unable to load fonts via FontAtlas

[trapazza]

Hi there.

I'm trying to add a font using the font atlas, but it doesn't work.
To do this I'm following these steps:

• Download a monospace font from Google Fonts to some data folder in Assets.
• In Unity, open font generator (Window->TextMeshPro->FontAssetCreator).
• In the Font Asset Creator, I set some parameters and generate the font:
  
• Click on "Save as..." and store the asset in my StreamingAssets folder.
• Add the font asset to the FontAtlasConfigAsset:
  
• Make sure the atlas is set in the UImGui script.
  
• Run the application, no ImGui menus or windows appear, and get this error message:
  

Could anyone help me please?