U0449

Can someone explain this code to me? Potential fixes? Any info at all?
"Invalid Data Received from Gateway C" on Code Reader

I did the transmission reset where you hold down the pedal without turning it on, may be related, didn't see the code before then.

Any help at all is appreciated, can't even find info on this code online, just generic obd2 code interpretations.

Vehicle is a 2017 Sport Autobiography​​​