About a week ago or so, my New3DS ran into an error when trying to go back to the Home Menu from TwilightMenu++. Later on, it got bricked. It wouldn't turn on. I thought it may have gone dead, but it wasn't so. With help from @TurdPooCharger today it finally got back to working order and I can now play once again all the games I like so much. Thank you TurdPooCharger, for saving my 3DS life and helping me regain my mental health. 
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You can view more details on the problem and how it got solved on the following threads:
Thread#1: https://gbatemp.net/threads/n3ds-error-unable-to-mount-ctrnand-or-load-ctrnand-firm.547307/
Thread#2: https://gbatemp.net/threads/n2ds-sd-card-data-management-corruption.546698/
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You can view more details on the problem and how it got solved on the following threads:
Thread#1: https://gbatemp.net/threads/n3ds-error-unable-to-mount-ctrnand-or-load-ctrnand-firm.547307/
Thread#2: https://gbatemp.net/threads/n2ds-sd-card-data-management-corruption.546698/
