Thank you for the help.  I am able to proceed with the game, but every time I return to the bridge, it plays the cutscene with Inquisitor Mercer telling me to go see the Harlequin.  An exclamation mark is permanently above Capt. van Wynter's head, but thankfully it does not seem to hinder any gameplay. 

Hello, thank you for fixing the mission.  I was indeed able to proceed.  Now I am stuck on Tyranid Menace.  Whenever I return to the bridge, it keeps playing the cutscene with Inquisitor Mercer telling me to go see the Harlequin.  Then, Capt. van Wynter keeps telling me the Freeblade Knight is ready to fight.  I was technically able to complete the missions, but each time I return to the ship, it's the same.  Now I am unable to proceed with The Visceram Prophecy because trying to talk to the Magos Biologis only plays van Wynter's message that the Freeblade Knight is ready to fight.