Hoping maybe a Blender dev can help with this. I have addons that load icons using the
bpy.utils.previews module, but they give the following error
AttributeError: module 'bpy.utils' has no attribute 'previews'
The previews.py module exists in 2.7x/scripts/modules/bpy/utils.
bpy.utils.previews only works for me in 2.78, not in 2.79 or 2.77/earlier.