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From the warning, Construction object with name = Construction 1 has a missing required input for field outside layer.

From the IDD file, this input is a required field. The next several fields are not required unless there is more than 1 layer, then those are required as well.

Construction,
   \memo Start with outside layer and work your way to the inside layer
   \memo Up to 10 layers total, 8 for windows
   \memo Enter the material name for each layer
A1 , \field Name
   \required-field
   \type alpha
   \reference ConstructionNames
A2 , \field Outside Layer
   \required-field
   \type object-list
   \object-list MaterialName
A3 , \field Layer 2
   \type object-list
   \object-list MaterialName