If you have the Polacre Refit mission from before the upgrade to 1.1.54.0, you should cancel it and re-take it, otherwise the turn-in will fail.
We will be publishing a server-side fix to this tomorrow evening, but if you've run into trouble with this issue, then you are asked to file a
support ticket with all the details so that we may assist you further.
We will be deploying a server-side build to fix this issue tomorrow evening, and will update the MOTD and our front page news with further information.
We apologize for the inconvenience, and thank you for your patience as we work to remedy this issue.
Best,
Aether