After putting the v18.0.0 keys in place, finalize your setup by installing the corresponding software firmware:
: Confirm that both packages are explicitly labeled as v18.0.0 . Double check that the prod.keys file is placed inside the system folder rather than the root directory. Games Not Appearing in Library ryujinx prod keys v1800 latest product keys work
Choose the option to dump keys from your or emuNAND . After putting the v18
Using older keys with 18.0.0 firmware causes "Key mismatch" errors. Header Keys: ryujinx prod keys v1800 latest product keys work