Setting Priority by FaFR doesn't work anymore (Change Module)

Since 14505 this code doesn't work (doesn't work on 14600 either)

OnValueChange for Impact and Urgency

var Priority_Matrix = {
"4. University": {
"4. Very High": "1",
"3. High": "2",
"2. Medium": "3",
"1. Low": "4"
},
"3. Institution / Computer Lab": {
"4. Very High": "2",
"3. High": "3",
"2. Medium": "4",
"1. Low": "5"
},
"2. Department": {
"4. Very High": "3",
"3. High": "4",
"2. Medium": "5",
"1. Low": "6"
},
"1. Person": {
"4. Very High": "4",
"3. High": "5",
"2. Medium": "6",
"1. Low": "7"
}
};
var impact = $CS.getText("IMPACT");
var urgency = $CS.getText("URGENCY");
var priority = Priority_Matrix[impact][urgency];//only for debugging
$CS.setText("PRIORITY",Priority_Matrix[impact][urgency]);
$CS.setValue("TITLE",impact+ " "+ urgency + " = " + priority); //only for debugging