Check the required expression for the System field in the form design. I think you have to include the Closed status in the expression.
sorry i am new to this project, how do i navigate to that?
Looks like the red asterisk only appears with using the Required Rules in the Business Rules and not the Required Rule in the field on the form. Regardless, you want to write your expression like below.
$(Status in ("Resolved", "Closed"))
$(if Status = "Resolved" then True
else if Status = "Closed" then True
it worked, thanks phan.