You need to pass the string Debug.Log("Core Loader") colour - try
Not working
https://docs.unity3d.com/ScriptReference/Debug.Log.htmlAlways changing to RGBAView attachment 2134
So I also tried - too does not workhttps://docs.unity3d.com/ScriptReference/Debug.Log.html
// Message using rich text.
Debug.Log("<color=red>Fatal error:</color> AssetBundle not found");