Status Code E01 on CSW Inverter Display

[USA-C2C]

Sold our Airstream and bought a Montana Legacy 3121rl. New to 5th wheeling. Just took delivery after waiting for parts and dealer to fix bedroom slide (another day, another story).

I am trying to get up to speed on the solar, batteries, and electrical systems. The RV came with SolarFlex 200 but we added 2 additional solar panels and upgraded to a 50 amp controller and put in 2 BattleBorn lithium batteries.

Once we had the RV home, I plugged it into our outside 50 amp electrical connection.

The Magnum Dimensions CSW Inverter is and has continually showed a status of E01 since I plugged into our 50 amp electrical connection. See picture.

I assume that status code is not good. Appreciate any thoughts.