Thanks for the update! The error doesn't occur anymore and I am now able to start an test the SR Works Unity Experience build.
However, when I'm in the Experience Demo scene in the Unity editor and hit play I get 999+ errors:
[SteamVR] Could not find actions file at: D:/mypc/user/SRWorks Overlay/SR Works 0.9.3.0/actions.json
UnityEngine.Debug:LogError(Object)
Valve.VR.SteamVR_Input:IdentifyActionsFile(Boolean) (at Assets/SteamVR/Input/SteamVR_Input.cs:1296)
Valve.VR.SteamVR:CreateInstance() (at Assets/SteamVR/Scripts/SteamVR.cs:188)
Valve.VR.SteamVR:Initialize(Boolean) (at Assets/SteamVR/Scripts/SteamVR.cs:98)
Valve.VR.SteamVR_Behaviour:InitializeSteamVR(Boolean) (at Assets/SteamVR/Scripts/SteamVR_Behaviour.cs:119)
Valve.VR.SteamVR_Behaviour:Awake() (at Assets/SteamVR/Scripts/SteamVR_Behaviour.cs:100)
I followed the step by step instructions in the documentations, what am I missing here?
Again, thanks for your help.