Edit: Fixed! 

After several hours, the bug is fixed. It works now.  This is the second time this bug has happened, on two of my characters.

The bug was: PC - V2.3.1

My character finds himself blocked and unable to be played because a random assignment is bugged, it remains unconfirmed and stay stuck to final state .  i cant valide the ending mission and the the game leaves on its own. If I restart the game, I have the same problem, I get the same end of random assignment message and the game crashes.

My Account : Viddock

This Character :