Switch System NAND Drive not present even though SYSTEM is mounted

[EphraimBane]

Whenever I try to do anything involving the SYSTEM partition, such as finding the SD key, I always get the error "Nintendo Switch System NAND Drive not present."

I've got all my keys including RSA_KEK, and I have PRODINFO in the same directory as the program.

Something that might also be related is the fact that I'm mounting my physical Switch using memloader instead of a regular NAND dump.