I just tried changing to 8bit with alpha, indexed 256 or indexed 255, but im getting this different error now
sentence after KeyNotFoundExpection means "the given key was not present in the dictionary"
I wanted to translate this watchface, but im not able to unpack it, it shows this error
Fatal|System.ArgumentException: Parameter 15 isn't supported for WatchFace
w WatchFace.Parser.Utils.ParametersConverter.Parse[T](List`1 descriptor, String path)