I was downloading some interesting looking add-ons and I copied the script to the addon folder like I was supposed to but when I tried enabling it in Blender it gave me this error (the addon is MCexport):

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.../addons/MCexport/I have the feeling you have copiedMinecraftCubeModelExporter.pyto your addons folder, whereas it should be in.../addons/MCexport/Export/MinecraftCubeModelExporter.py(and all the other files accordingly) – batFINGER Feb 17 '18 at 07:36