This version of Unity is unsupported.
Method group is Obsolete

LightmapEditorSettings.enableAmbientOcclusion

Obsolete LightmapEditorSettings.enableAmbientOcclusion is obsolete, use Lightmapping.lightingSettings.ao instead. public static bool enableAmbientOcclusion;

Description

This property is now obsolete. Use LightingSettings.ao.