You error is referring to the EMS Sensor named "WIN_2_SOLARIRRAD" -- you had pasted an example of a different EMS Sensor named "Win_1_SolarIrrad" (which seems to have input fields defined correctly). From the end of the first line showing the severe error, you have set the Output:Variable or Output:Meter Name input field to

SURFACE OUTSIDE FACE INCIDENT SOLAR RADIATION RATE PER A

when this should be set to

SURFACE OUTSIDE FACE INCIDENT SOLAR RADIATION RATE PER AREA

to match the approach of that the correctly defined EMS Sensor named "Win_1_SolarIrrad".