[Wii U] Got this error playing Smash 4

[proper ingot]

So I was playing Smash 4 on my Wii U and when I tried to friend someone after the match ended my Wii U gave me this error and prompted me to turn off my system.
Is this known yet?

[sacred blade]

Yes it's known

[severe ferry]

199-9998

[maiden smelt]

199-9998 (Wii U)

Wii U support code detected
Information is WIP and may be missing/incorrect

https://preten.do/199-9998

Module Name

Unknown

​

​

Module Description

Unknown

Error Name

Unknown

​

​

Error Description

Unknown cause.

Solution

Unknown solution.

Console dialog message