Quest is: Sew far, sew good
Problem: Handcrafted Silkweave Satchell isn’t appearing in my tailoring list when I filter to legion tailoring so I can’t complete quest.
All my addons are removed has anyone else seen this problem since the new ui came in?
This seems to affect other Legion profession questlines, too. I would submit a bug report, as well, but some players are creating workarounds.
Check out this post for reference until they create a fix:
Seems like it would probably be the following if I’m interpreting it correctly:
/run PickupSpell(186803)
Thanks for the script - Much appreciated - will log this in the bug report - you are a sanity saver 
I had the same problem with the Tailoring quest chain. Hopefully, some people on Wowhead provided the command lines to be able to put the skill needed to craft those things. I also contributed with some of them so hopefully you can still progress through them. I started them all today and I already finished them (painfully)
For the Tailoring quest Secret Silkweaving Methods: from Wowhead user. Use the ‘fix’ for the lining twice.
/run PickupSpell(187064)
/run PickupSpell(187065)
/run PickupSpell(187066)