It is going to get dark on your guys pretty quick. You need to have the working battery and a way to keep it charged.
Like stated above it could be you now have both the Battery and the Converter fried.
Determine if the battery is OK and then I would go to local autoparts places or big box stores and pick up a Black N Decker VEC1093DBD 40AMP portable battery charger. You need one of these anyway if you are serious about camping in your RV unit. You may have to purchase a new 12VDC deep cycle battery as well. I would also pick up a couple of regular house 120VAC lamps too and a 120VAC fan. We have the O2COOL 10-inch portable fan that runs on AC-12VDC-D CELLS. Another great item to have around for PLAN Bs...
These items should keep you going until you can get a converter/charger on order from AMAZON or local RV PLACE if you are close to one and they have one in stock.
Take a good luck at the block diagram I just sent - Note most of your essential items are mostly 12VDC powered and you may not have 12VDC to use now with both the converter and the battery failed.
Like I said it may get dark on you pretty soon and all you will have is flashlights and candles if you brought along any hehe...
Roy Ken