https://switchbrew.org/wiki/Error_codes
2124 = Account module
4168 =
Integrity Verification Failed. ROM is corrupted
In other words, as Drax already said, your NSP fails verification because you don't own it and are using a fake ticket, thus you cannot access online for that title. Also a big ol Red flag with white text saying "Yo, ban me" on it. So you may or may not be able to even use those 7 free days of online. That said, you said you don't care but I'm just passing info in case someone stumbles on this thread later on.
*EDIT*
I herpaderp'd and posted 4618 because I'm a dumbass. It means ROM is corrupted. Could be ticket related or it could be corrupted to the point where the game doesn't even launch. Does the game open?