I don't know what a general purpose breaker is. My Kodiak Cub has a "Main" 30 amp breaker that controls all shore power to the TT. My TT also has several "branch" 15 amp breakers. One branch is dedicated to the converter. Nothing else on the circuit.
If your converter is connected to the breaker that trips, the converter could be the cause.
You need to know what appliances and outlets are on the "general purpose" breaker. Disconnect them one at a time to troubleshoot.
My converter/charger has a 30 amp main output fuse and a 40 amp reverse polarity fuse to protect when hooked up backwards. I expect replacing the fuse would be all that is needed.
Other 12 volt appliances may be connected directly to the battery through fuses not on the main panel and may have been damaged. I would not expect such a failed device to trip a circuit breaker, but it is possible in some cases.
Dutchman Kodiak Cub KD176RD 2018
Nissan Pathfinder 2015