I'm struggling on trying to install a codename mod

[daveandbambifan1234]

[r6915ee]

Are you trying to place a mod in the assets folder? Like with Psych and many other engines, you place modpacks into the dedicated mods folder, except you cannot extract the contents of the modpack directly into the mods folder. Thus, the mods directory would look like:

mods
|-"Mod 1"
  |-data
  |-images
# ...

[moxie-coder]

I've said it before once and I'll say it again, YOU👏PLACE👏MODS👏IN👏THE👏MODS👏FOLDER. NOT👏THE👏GODDAMN👏ASSETS👏FOLDER

[daveandbambifan1234]

no wonder why the mod didn't work, it's because the tab button was not obvious

[r6915ee]

For your information, a piece of text on the main menu states the mod switching keybind (which is TAB by default), but you do you.