setState not working from inside AlertDialog
Solution 1:
The main state class also have setState and while you are using StatefulBuilder it also has setState, being scope priority setState is coming from StatefulBuilder. You can rename it and use
child: StatefulBuilder(
builder: (context, setStateSB) {
....
setState((){ /// for state class IU update
tasbeehChantCanAdd = "state changed";
});
setStateSB((){ // update Ui inside dialog
tasbeehChantCanAdd = "state changed";
});