I, too, got the security issue this morning when trying to post copper ore and petrol barrels for a quest. I closed out FT, returned about an hour later and was able to post for petrol barrels and something else. However, I had already started the process for copper ore so don't know if that was the initial trigger.
BTW, love this game and am totally confused about the new EX tools and what I don't have to already own to buy them.