B team with no calendar? (Valencia)

It is unfortunately. This more common if your B team is created after the game starts. Basically, it needs to balance the fact that you cant just create a new team and always have it be given a spot in a league (based on open slots), with fun. In this case, I would prefer they deviate from reality and simply guarantee that if you make/have a B team, it is always in a league. If you know what team you are going to play before you start the game, I would create the B team and add them to a playable league in pregame editor.