Trouble Installing game mod

[doctorase]

I found a mod for Pokemon Sword that modifies Textures and use a folder romfs. I have search on google how to install it on sxos, but only found that i need to install at SD/sxos/titles/HERE. Then I have paste it on sxos/titles/0100ABF008968000/romfs... then when i start the game, the game crashes. If i remove the folder the mod works correctly. I want to know if I'm doing wrong or maybe it's fault of the mod. I have the game at latest version, the same of the mod need