$0 monthly towards PSLF on PAYE? Is the simulator broken?

hi all, I’m about to graduate from post-grad, husband very recently laid off. I have about $24k in unsubsidized loans and I tried the calculator to see how much I would potentially be paying in a few months. I make about $54k with dependents. Husband’s income is now $0 and he has $30k in fed loans.

so the simulator said my best option is PAYE but it’s saying that I’ll pay $0 monthly, $0 total to be paid, fully paid off in 2036 and $40k PSLF amount. How is this possible? Don’t I need to make 120 payments to qualify for PSLF? Is the simulator broken just like the rest of the government?