Error when enabling addon

[isohedron]

There is a error when I enable the ypanel addon.
"Blender 2.78c/2.78/scripts/module/addon_util.py" line 349, enabled
"Blender 2.78c/2.78/scripts/module/addons/ypanel-master/init.py" line 1668, in register

[ucupumar]

Please provide error screenshot, I can't define the problem with just that.