Gimp 3.0.6 Python plug-in bug with text layer.set_color(color)?

[Volker]

It feels good to see that I'm not the only one who has to fight those adversities. You say that it's a good thing that it becomes easier by and by. But there is another good thing: a sort of mixture of proudness and relief when you come to the solution you were searching for such a long time.

Let's take it as a challenge.

Thanks for the link.