guys i need sum help every time i try to play any online match in a game like splatoon,or mk8 it gives me error 118-0516 and it says failed to connect to partners device it been happening for 2 days i dont know what to do the only exeption is mario maker pls someone help

guys everytime i try to play online i get an error 118-0516 and it says failed to connect to partners device its been happening coming up for 2 days with every time i try to play an online match it happens in every online game pls someone help me out

anyone wanna be friends