I use 2017.2.1p1

and get this error

Authentication error: The timeout date has passed (0x24412754)
UnityEngine.Debug:LogError(Object)
OctaneUnity.PluginController:LogErrorCallback(String)
System.Object:wrapper_native_00007FFDE9B54310(Boolean)
Octane.DLL:Api_Init(Boolean)
Octane.Api:Init(Boolean ...