The error message "Could not find type or namespace name 'SpineSprite'" suggests that the Spine C# assemblies might not be correctly set up in your Godot project. To resolve this, ensure that you have followed the C# project setup steps correctly. Specifically, make sure you have copied the necessary Godot C# assemblies from the downloaded Godot editor ZIP file to the godot-nuget directory in your project. Additionally, verify that your nuget.config file in the root directory of your project is correctly configured to use the godot-nuget directory as a package source. This setup allows the project to use the Spine-enabled assemblies instead of the default Godot assemblies.
If you have already done this and the issue persists, double-check that the Spine C# assemblies are present in the godot-nuget directory and that the nuget.config file is correctly pointing to this directory. Also, ensure that you have cleared your NuGet cache as mentioned in the documentation, as old assemblies might still be cached.
