Shadows of Valencia: Help with Sonya & Deen Code

Not sure if this should instead go in the Questions Thread; just to be sure I'm posting it both places but I'll delete it on request if I'm overstepping.

I'm currently playing Shadows of Valencia on Citra.

I'm trying to use a "Sonya & Deen Recruitment" code I found here, but unfortunately I can't seem to get it to work, even after looking up additional documentation and finding I'm supposed to hit Start and one of the shoulder buttons simultaneously to activate.

I've also found that a lot of the codes in that document don't work or crash the game; the only one testing has found works consistently is the only one tagged "1.1," but after finding a similar code also tagged "1.1" and confirming they're identical it still doesn't work.

Are these known issues? Should I be talking about this here and not in another subreddit?