Arguing over what to call the combination inverter and shore battery charger/converter is kind of silly. The manufactures can't even agree on that. Many of them are just called inverters, but they are both.
Anyway, the 2013 190 most likely has a Tripplite 750 watt inverter with a 45 amp charger (converter if you prefer). The Tripplites are famous for tripping shore power ground fault outlets if that is what you are plugged in to, so check that first. There should also be a reset on the Tripplite-it will be behind a removable door right inside the passenger side rear door, right behind the wheelwell. You should have a manual for it in the Roadtrek literature bag. The led lights on the unit will tell you its status.
If it is getting power and not charging the batteries, it may have failed, but that doesn't happen often, so it is more likely not getting power if it is not lit up. There will be a 110v circuit breaker for the charger in the fuse panel by the side entrance. You should also be sure that you have 110 volts to the rest of the coach, the microwave should be lit up whenever you are on shore power. If you don't have power, you could have a failed transfer switch.
Good luck, hopefully it will be something easy to find.
On Edit-here is a link to the Tripplite used (I think).
Tripplite inverter/chargerYou can download the manual there also.