The mission Escort a Frigate is giving me the error "Unable to find the mission you have requested." When i click on the "mission briefing" button, plz fix.

You might try clicking the 'Missions' tab again to refresh the list of missions, especially if you recently completed some.

I've had an issue with this mission for a few days now. I finished it, but the completion bar on the side is only showing 5/10 completed, and when I try to move onto the next mission in the story line it says that I have not completed the escort mission, therefore I cannot continue. Any advice? I've tried resetting and trying to complete the mission again. Not sure how to go beyond this point.