OH2 rule isn't working on OH3

I just started to update my system to OH3. But some post.update scripts aren’t working any more. What did I need to change to get it back working ?
The weather_update item doesn’t change after running the script. The doesn’t give an error.

Here is an example:

rule “update weather today”
Item Temperature changed or
Item Weather_OWM_Condition0 changed or
Item Date changed or
System started
weather_today.postUpdate(Weather_OWM_Condition0.getState() + " " + “bei” + " " + Temperature.getState().format("%.1f °C"))