How to add custom modes or modpacks

[Mte90]

I am trying adding mods in the various instances folders, also starting polymc but the game when starts doesn't detect them...

[Blazeyboyyy]

This worked for me once. I added a mod and a shader pack post-installation, but since then it hasn't detected subsequent mods I've added

[Mte90]

#14

I tested and I am already using it