Hello!
When I try to add the spine-unity 4.1 package to Unity 2021.3.21f1 by adding the git url ("https://github.com/EsotericSoftware/spine-runtimes.git?path=spine-csharp/src#4.1") it fails like this:
[Package Manager Window] Cannot perform upm operation: Unable to add package [https://github.com/EsotericSoftware/spine-runtimes.git?path=spine-csharp/src#4.1]:
Could not clone [https://github.com/EsotericSoftware/spine-runtimes.git]. Make sure [4.1] is a valid branch name, tag or full commit hash on the remote registry. [NotFound].
UnityEditor.EditorApplication:Internal_CallUpdateFunctions ()
I'm sure I've simply messed something up here. Any pointers would be welcome.