I unpacked my multiplayer mod and when trying to pack it, it's not working. What to do? Help please

I unpacked my multiplayer mod and when trying to pack it, it’s not working. What to do? Help please.

You’re not supposed to unpack it in the first place.

You might just have to reinstall it at this point.

i have the same problem but whenever i delete it then reinstall it, it just doesnt work