Forum:Minisub Mission Not Popping Up

Welp, simply put, you know, the mission isn't popping up. I've done every single mission before it, Franklin's shooting is at 100, Michael's flying is at 100, I've done the first Assassination mission, and it's still not popping up. Any help? BTW, I'm on the XBOX One.

Load a previous save. ( Talk ) 03:59, December 26, 2015 (UTC)