It appears you have selected an invalid game folder

[manuco11]

I've tried everything I've seen on the internet even youtube videos but nothing has worked, please help.

[HannesC]

You're on the MW3 tab. Switch to BO2 MP/ZM from left hand side of the launcher and reselect the directory.

[Resxt]

Reading the instructions properly and looking at what is in front of you is way better than watching potentially wrong/outdated videos

[tiny_Arctic]

@lResxt Bruh where? WHAT folder is it talking about?

[Dss0]

tiny_Arctic you selected mw3 (iw5) in the launcher and then set your bo2 (t6) game folder there. Switch to bo2 on the right: