2017 Mazda6 Grand Touring with the Tech Package

Had a weird incident this morning. Stopped for coffee. 5 minutes in and out. At start, all warning lights stayed on. Getting message about blocked camera and key issues. Initially, could not turn car off. Finally turns off. Restart, all lights go off, but blocked camera message remains (no snow/a light rain). Get to work. No obvious issues like overheating, rough idle, etc. Leave for lunch. Blocked camera message gone, but check engine light stays on. My first thought is something got crossed up at coffee stop, so engine management or electronics need reset. Is there a way for me to do this without making a trip to the dealer? Is it as simple as disconnecting battery for 5 minutes?

Any help will be appreciated.

Thanks, Mike