Nintendo will wind down 'Super Mario Maker' for Wii U on March 31st

You’ll have to move on from the original Super Mario Maker if you want to create maps. Nintendo has warned that course uploads will no longer work for the Wii U game as of March 31st, 2021. If you want to craft a ridiculously difficult level or other...

source https://www.engadget.com/nintendo-winds-down-super-mario-maker-wii-u-163008385.html