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Just switch the material to a plain diffuse and make sure there is nothing on the material's emission channel...
It might have accidentally imported it as an emitter.
It does the same with a normal diffuse material with no emitter. I made the light come in from a different angle and that helped. It seems that it only turns blue if the light comes almost straight above through a window in the roof.
I think the issue is that your model is imported way too large and the default configuration without global illumination on for editing (eg directlighting) has it's default AO ray length too small.
If you switch to pathtracing it should render fine, or, for editing or previewing, either import in the correct scale, or change the AO length parameter in the directlighting kernel settings in the preview configuration.