how do i fix this??? i was able to play a match an hour ago, ive tried restarting the game and that didnt work

how do i fix this??? i was able to play a match an hour ago, ive tried restarting the game and that didnt work

delete shared save data (not just save data, SHARED save data) and try again it won't delete your save
DONT DELETE SAVE DATA AS THE OTHER GUY SAID, just shared save data. Also use pretendo hackless ip, its my secret tip to never having that error code again.