When you see this error, you need to select DONE in the top right corner of Sales Mode in Aurora.
If you select DONE in the top right hand corner in sales mode and this does not clear the error, check to see if the inverters are strung together. Select the entire system and click string/connect and choose the inverter you want to string onto this system. Then re-sync the design to Enerflo. This should clear the error.
In Aurora, reps or the design team can string them together in Aurora Design Mode.