I sent an email to JR Americas about it, but I'll probably follow up with a phone call today.
I believe I was in the travel adjust menu when it happened, but not 100% sure. I wasn't on the home screen.
I've had the transmitter since March and do have other aircraft setup on it including another turbine jet (UF) which I've flown a few times with it. It's running the version 2 update.
I finished up programming my J-10 on the new receiver (RG1131BPU) yesterday and didn't see the error message.
I'll wait for a response from JR about it before using the transmitter again.