For those who installed the new Nimbus update using Universal-Updater and can't get ACNL online to work, there is a way to fix it! Download nimbus from github, find the nimbus.3gx file, and put it in luma/plugins. Also make sure your plugin loader in Rosalina Menu is enabled.
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If the top screen goes blue when you start up ACNL after doing this, that means it's working!
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