@Staysis Make sure you match the Spine Runtimes version and Spine Editor version. E.g. you can't load skeletons exported from editor version 4.2 with a runtime version != 4.2.
spine-godot relies on our generic spine-cpp runtime. I'm currently upgrading spine-cpp in the 4.2-beta spine-runtimes branch to be able to read exports from editor version 4.2-beta.
The Godot build you are using is based on spine-runtimes version 4.1, so it won't be able to load skeletons exported from editor 4.2.
