The "Join" button on a Mission might be mission for several reasons
If you are unable to join a Mission because the "Join" button isn't visible, it could be due to one of the following reasons:
- The Mission has ended: Missions are often time-limited, meaning they are only accepting applications for a limited amount of time. Once a Mission has ended, it will no longer display the "Join" button as it is no longer accepting applications.
- The Mission has reached its participant limit: Some Missions might have a maximum number of participants allowed. If the limit has already been reached by the time you try to apply, the "Join" button might not be visible.