Opening a project with Amazon GameCircle Plugin in Unity 5.5 results in the following compile errors:
Assets/Plugins/AmazonGameCirclePlugin/Source/UnitySocialAPI/AGSSocialLocalUser.cs(19,14): error CS0535: `AGSSocialLocalUser' does not implement interface member `UnityEngine.SocialPlatforms.ILocalUser.Authenticate(System.Action<bool,string>)'
Assets/Plugins/AmazonGameCirclePlugin/Source/UnitySocialAPI/GameCircleSocial.cs(20,14): error CS0535: `GameCircleSocial' does not implement interface member `UnityEngine.SocialPlatforms.ISocialPlatform.Authenticate(UnityEngine.SocialPlatforms.ILocalUser, System.Action<bool,string>)'
Apparently this is a regression as seen here:
If someone from the GameCircle teams is here, please fix soon. Thank you!