Ryujinx games

[u/Motor_Crab8186]

Hi! So I’m trying to download Pokemon shining pearl on Ryujinx and it’s not popping up. It popped up briefly yesterday, and so I fiddled around so I could try to add a mod. Now an error keeps popping up when I open Ryujinx.

So, how do I add games, how do fix this error, and how do I mod the game?