Booking invalid

I am facing the Invalid Booking issue after checkout, hotel rooms are having price 0.00 using HotelWP theme, switched to default theme, same error “Booking invalid”, however in the backend, the booking is received, but the error is on the frontend. Pages are setup correctly in the backend settings. The hotel thank you Page is having the shortcode [hotel_booking_thankyou], and the Redirect to page after book page is having no shortcode.

Screenshot: https://ibb.co/LdZ85c4G

The page I need help with: [log in to see the link]