This worked for meHi,
I had EXACTLY same issues as you and I have now fixed the game. here it's what I did:
install firmware 16.0.3, install latest DBI, install latest Hekate et latest Atmosphere. After this done, download the sigpatches from this forum and replace the 2 folders on your sim. From all of this, I thing it's the sigpatches that made the difference. Because I couldn't launch the game before (corrupted) et neither install any updates (corrupted). First time I tried to replace the sigppatches my switch didn't turn on, but after many copy paste, it worked.
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This worked for me
Last edited by Michaelmcleer,