Can u tell us which error codes is the wiiu showing you?

i am getting error code 104-0265 and it says "couldnt connect to server"

Hello, I'm happy to be here again since miiverse closed, it's time to start from scratch but I guess it will be fun, greetings to the english community from Mexico

Ok here's some tips u can try: 1) Make sure u have nimble installed in your SD, and make sure Aroma and Inkay are up to date 2) Connecting your wiiu via an ethernet cable usually helps with more stability 3) Delete splatoon shared data in the wiiu settings

4) Reboot your wiiu after having deleted splatoon shared data 5) If u don't have an ethernet cable try connecting your wiiu with an hotspot 6) BEFORE trying to enter splatoon plaza make sure that the friends list is correctly working

Point six is because friends list usually takes some minutes before starting to work properly, and since friends list is a vital element for you to being able to play online if u access splatoon when the friends list is still offline u will get a connection error

Lucky for us, Pretendo developers are working in making the friends list system more stable and reliable, we'll have to wait a little bit but it'll be worth it. I really hope u'll be able to fix your problem and play online again!