I changed a few times the fill color and opacity of the progress bar.
It worked fine at first.
And suddenly it stopped working.
In the PIE window I don’t have any error message in the Log.
In the standalone window I have this warning message.
I removed the progress bar and am using a border as background instead… now everything works perfectly at runtime… I can change the color without any problem… definitely keep the fill color of the progress bar progress just doesn’t work at runtime… it’s checked!! Dead the dog, the rabies is gone!!