Hello everyone,
A few weeks ago,my Wii U was showing some difficulties in open the Friend List. 
All others services like Miiverse,Browser,eShop are working fine and there is no problem with them.
Now my Wii U version is 5.0.0U,and I'm getting an error that prohibit me to
access Mario Kart 8 online or any kind of online service like the communities to play with friends.
Error Code:101-0112 
Unable to connect to the server.
Please try again later...later...later...5 days has passed since the launch of Mario Kart 8 and I cannot play online. 
The same does not happen to my Nintendo 3DSXL,I can play Mario Kart 7 online without
any kind of problems,and the connection is fast enough to handle this.
Do you know what to do?
(PS:I already changed to static IP and those Google's DNS but it did not work!)
Please help,thanks in advance! 
Best regards