ComputeIntSolarAbsorpFactors error with AirBoundary?

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I have a following severe errror.

   ** Severe  ** ComputeIntSolarAbsorpFactors: Solar distribution model is set to place solar gains on the zone floor,
   **   ~~~   ** but Zone or Enclosure ="Solar Enclosure 1" does not appear to have any floor surfaces.
   **   ~~~   ** Solar gains will be spread evenly on all surfaces in the zone, and the simulation continues...

I have read previous posts (1 and 2) related to the ComputeIntSolarAbsorpFactors error, but my case seems different from them. I have modelled with Rhino + Grasshopper.

There is no Zone name "Solar Enclosure 1" in my model. I can't identify where "Solar Enclosure 1" is, but what comes to mind is the that I'm using Construction:AirBoundary to floors/ceilings of some zones.

1. Do we get the ComputeIntSolarAbsorpFactors error when Construction:AirBoundary is used as in my sketch above? Or is there another cause?
2. Can I ignore this error?