Program is flagging an error on Recover Rebate Credit Worksheet Line 19

I am completing taxes for my mother who passed away 8/18/2020.  She received the 1st stimulus check in May 2020 when she was still alive.  She did not receive the 2nd payment which I think is correct, however the program is flagging Line 19 of the Recovery Rebate Credit Worksheet as an error.    How should I handle this error?