Title downgrade fix is broken, firmlaunch hook appears broken on n3ds. Disabling firmlaunch hooks seemed to solve it. (http://nus.cdn.c.shop.nintendowifi.net/ccs/download/0004013820000002/0000002d for n3ds)
Delete native.dec if you haven't.
I didn't do these steps at first, but once I distabled to reboot hook and deleted the native.dec, I was able to boot into corbenik againHow do you get the URL, exactly?
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I hate to double post, but this fix is really a bandage for the issue. Without the hook, DSi/GBA games will not work, even on your new3DS. But it still does basically let you boot into Corbenik, even if you end up loosing some features