I'm on a similar situation, only carts give me the error, on Stock Sysnand and on Emunand, but that happened after I created the 9.0 Emunand, before it I had no problems.
I'm on a similar situation, only carts give me the error, on Stock Sysnand and on Emunand, but that happened after I created the 9.0 Emunand, before it I had no problems.
Atmosphere block the card reader by default now beacause it burn a fuse,if you want to activate it do the following :
If you wish to play gamecarts on 9.0.0 (but forever prevent yourself from playing them on < 9.0.0), set nogc = 0 in BCT.ini.
I found my problem, I deleted the Nintendo folder while creating my new Emunand, so the games that failed to load where the ones with updates installed on my SD, I just checked for corrupted data and then redownloaded their updates and everything is working now.