Title: Weaver GUI lock-up
Summary: Having the Weaver que the Thick Leather Vest in “maintain” 1 in stockpile produced the error below
Steps to reproduce: Weaver had 6 “Spool of thread” 4 “Bolt of cloth” and 2 "Bundle of leather in the “maintain in stockpile” selection and was doing fine with those, as soon as I tried to add the “Thick leather Vest” to it the error happened and the gui locked up, unable to open anything else, have to close the game window.
Notes: There was a smaller error window under the larger one: