The following 10-part questline from Bahar can no longer be completed since the revamp to the trade system on 6 April.  These quests have you connect the nodes between Velia and the Western Guard Camp, then invest in Loggia farm production to send a worker to farm potatoes, and gives you some starter workers and a flimsy wagon along the way:

It's a cute questline and you obviously intended for it to still be completable after the revamp, because in the same patch you changed it so that quest #5 no longer requires Velian Wine:



Unfortunately this doesn't matter, because nobody can reach this point anyway.   You need a Velian Wine to even be able to pick up the #2 quest in the chain, "[Trading] Trading Activity," and this wine is no longer obtainable. 

As a result you can only do the very first quest in the chain, in which Bahar now might as well say "Hey there adventurer I see you're interested in connecting nodes and using workers so let me teach you how it all works!  Actually no nevermind, ok bye."

:(

Someone at PA was really excited about their trade update and never bothered to update all the quests/book attached to trade, this weeks global labs has some fix's on it but that will be nearly 2 weeks out.

mission Impossible?
How can I buy an item?

Sadly, these items are locked due to the giant merchant guild buying everything out. The stock will be replenished 7 days after the lock

That is a separate issue to what I'm talking about.

Those items replenish.  Velian Wine does not, because it no longer exists.

This chain also wasn't included in the trade quest fixes in today's patch, and is still broken.

Just ran into this bug yesterday. It's still there.

Slightly annoying as I like trading and economy in games like these.

I saw this in the patch notes today and figured it was finally fixed, but nope.  All that changed was the removal of some text referencing Velian Wine in the first quest.

It's baffling how PA keeps coming back and making changes to dialogue or objectives in this questline, while continuing to miss the fact that the entire chain is broken and cannot be done at all.

Bahar will not even offer you the second quest, Trading Activity, unless you're carrying a trade item which no longer exists in the game.  This can be confirmed in-game or on any database site.  You keep deleting mentions of Velian Wine in the dialogue without actually removing the requirement to have the wine with you.



It's even worse when you consider that this is the questline which the black spirit guide will direct new players to when they ask how to learn about trading.  You are making the black spirit cry.

The velian wine is also tied to the Progress Report quest in  Ataraxia's Travels which brings you to Behar for the Velian wine but refrence to it is deleted in the quest description.  Going to Arethel to try to complete this ql without the wine; and it does complete, wine not needed for this QL; even though they autotrack to Behar in velia to get some - < not needed..

This is about 1/2 way through this QL.

Entire QL:  https://bdocodex.com/us/quest/8120/20/

Rovii

Quest lines are fixed at some point
I recently did whole quest lines without any issues.

Just remember to read all quest descriptions and instructions