Playlist controller script execution order error message.

Hello I'm having error messages with playlist controller : 
Playlist Controller is not initialized yet. It must call its own Awake & Start method before any other methods are called. If you have a script with an Awake or Start event that needs to call it, make sure PlaylistController.cs is set to execute first (Script Execution Order window in Unity).
UnityEngine.Debug:LogError(Object)
DarkTonic.MasterAudio.PlaylistController:UpdateDuckedVolumeMultiplier() (at Assets/DarkTonic/MasterAudio/Scripts/Utility/PlaylistController.cs:482)
DarkTonic.MasterAudio.MasterAudio:set_DuckedVolumeMultiplier(Single) (at Assets/DarkTonic/MasterAudio/Scripts/Singleton/MasterAudio.cs:4988)
MasterAudioInspector:OnInspectorGUI() (at Assets/DarkTonic/MasterAudio/Editor/MasterAudioInspector.cs:748)

I've tried to change the script execution order but i still got the message when i touch the volume multiplier. What am I supposed to do?

Thanks in advance