missing a pack.mcmeta file

[Ahtna]

I can play the game but a lot of the mods don't seem to be working, for example I haven't seen any hamsters and my morphs aren't showing up in the morph box. I checked the launcher and there is a long list of these:

[WARNING] [Forge Mod Loader] Mod Forge Mod Loader is missing a pack.mcmeta file, things may not work well

It's gives that line for almost every mod as far as I can tell.

 

Is there something I should do to get rid of these warnings?