Hello.I have the similar issue at Prized Possessions (Heart of thorns chapter in Auric Basin). Every time I pick up the Glint's egg, the game disconnects with error 7:11:3:202:101 I've tried instance several times, waited, skipped video, not skipped video, changed firewall's properties, rebooted router, etc., and the quest disconnects anyway. Also, I've experienced some random disconnects just after the addon downloading, but after about an hour the game worked well at other locations but was disconnecting in the personal story.
Have the same problem, can't sell a single item. Everything else seems to work fine, so problems are likely not with my network.