Volcano
Hello This forum post helped me solve the problem. Follow the steps posted by RavenMRK.

So I've followed the spine-godot Runtime Documentation mainly the C# Project Setup section, yet I am still stuck with missing reference. I apologize for asking for help on such a seemingly simple step.

Misaki
Gotcha thank you!

Misaki
Hello Thanks for the response!
I am on Windows 10. I think it may have to do with my Spine version...
What is the minimum Spine version that is compatible with the Godot runtime?

I am using Godot 4.1.2 with C# support
When exporting as binary I still cannot seem to use the .skel file in Godot editor.