Common ProblemsAlready did all of the contribution dailies first before picking up the quest Warfront Contribution which requires you to "make a donation to the War Effort."
Repeatable Warfront contribution quests will be reset during the next time your faction is in the contributions phase. If you have already completed all the available contributions before starting the quest Warfront Contribution (Horde: 53209 | Alliance: 53185), you will need to wait until the next contributions phase to complete the quest.
Most items that can be counted as professions contributions are ones that can be purchased or traded from other players or via the Auction House. If you still have contributions quests available for other professions, you may be able to obtain those items and contribute them to get quest credit.