When using Aroma/Inkay to connect in the past, it was possible to go online by opening the Aroma menu and selecting the option to unregister BOSS tasks. Now, due to a recent Aroma update, the option to unregister no longer works and the game hasn't been able to connect since.
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Download the nightly version of Inkay and everything will work fine with Aroma 20
I was able to get it working with Nimble30 installed in the correct folder as it needs to inject the pretendo stuff before the main OS initializes. I would google "pretendo nimble" there are several tutorials. also make sure to reboot after setting to "true"