Advances radio button is not available-creating an expenses report

Hi Team,

Please find the scenario below.

1. Created an iexpenses with Employee advance(#Test_P1), after approval and export it will be available as Prepayment Invoice in AP.

        Once paid then the Prepayment Invoice (#Test_P1) status should be ‘Available’.

    2.  While creating the new expenses report, Advances radio button is not available to utilize the advance  amount .

    3.  Even though the Prepayment Invoice status is showing as 'Available ' in AP

        Note : Users were able to utilize the Advances till last week, suddenly this issue happening.

    could you please suggest us what went wrong, how to rectify the issue

Thanks