I had partially completed the Felwinter's Lie quest, was on the grinding portion. This morning I noticed that it's missing from my account inventory. I checked my collections tab on the off-chance that I might have not noticed getting the reward and then I noticed that Felwinter's Lie is not even listed as an un-discovered weapon. Someone else on this forum said to check with Ava on Mars, but she does not have the quest available. Please look into this error and reactivate the quest.