Help me. I don’t why does it happens, but it’s only on : Mario 3D Worlds, Wii Party U, Wii Fit U. 
Those games aren’t currently supported by Pretendo afaik, sounds like it would be Miiverse related though.
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Ensure Aroma and Inkay, as well as the Payload-Installer is up to date, then check if the game is supported to any degree, or at all.