Can’t make reservation – National Car Rental Review

Looking for a available rental car and get an error to change the time and date. I check the same day and time in the browser and find all sorts of cars available. Had the issue with iOS 14 and 15. have the newest version installed and still can’t find anything in the app. Uninstalled the app, restarted the phone, installed the app again; same issue!
Review by Donky's Kong on National Car Rental.