Can't complete danzig bay mission

[THEBERBSTER]

So there is no real concept of success or fail in this game.

This is one for Vecko to answer as in TWOS Open Horizons II v2.5 has been tweaked.
It would not be correct for you to do nothing and move from one campaign to the next.

The mission starts and ends regardless you take part of it, right?

The clock is ticking.

all missions has pending status and none has completed status except for the tutorial mission.

This is due to the changes that have been made by removing the "Tonnage Bar."

You may have noticed the first time you opened the navigation map in "Baltic Operations" something called "First Deployment."
I think Vecko added this completed mission too make sure that the Campaign "Total Germany is achievable.

Peter