@BLucifer Sorry to hear you're having troubles. Which version of the spine-unity runtime (name of the unitypackage, also listed in Assets/Spine/version.txt) are you using?

If you are not using the latest 3.8 spine-unity runtime form the download page, could you please try whether updating the runtime fixes the issue?

@BLucifer Since the error message call stack lists AddressableAssetInfo: does the issue also occur when you're using the skeleton normally (directly) in a scene and not by using addressables or other means of delayed loading?