yhea...that's why...Of course it wont work. They upped the minimum NFIRM version allowed by NS: https://www.3dbrew.org/wiki/11.3.0-36#NS
You can downgrade your NFIRM if you want but the system software will refuse to load.... ┬┴┬┴┤( ͡° ͜ʖ├┬┴┬┴
But I was thinking...does the NS check the version only before loading home menu, or in all cases?
Because, if we can launch something before the check...
Do you know the button sequence unsed by 2DSsaver? That can load a cartridge before the initial setup? If the NS doesn't check the version when launching a cartridge in that way...