Can't view results from Wiilink polls and Mii Contest Channel Miis and Stats

When I click on “View Miis and Stats” it loads long and then returns me HTTP Error 522


And when I go to EVC Poll Results - WiiLink and click Nintendo or Miitomo it works but Wiilink doesn’t. It loads long too and returns me the same Error as Mii Contest Channel.

How to fix it?