Make sure you press and hold the starter rocker button to the stop side for about 30 seconds. Sometimes you'll hear a click meaning the fault relays reset.
What happens is you may have had a fault while it tried to start the last time, such as no fuel, etc. and you have to reset before it will start again. I get that sometimes in the spring while trying to purge the propane fuel supply of air. If it cranks too long without sensing fuel it faults.
2013 Winnebago Itasca Meridian 42E
2013 Jeep Wrangler Unlimited Sahara Towed