Another Lovely UI Error

Just got this while trying to lay down a stockpile.

release-821 (x64)
Uncaught TypeError: Cannot read property ‘show’ of undefined
TypeError: Cannot read property ‘show’ of undefined
at n._updateTabs (http://radiant/stonehearth/ui/game/modes/zones_mode/stockpile/stockpile.js:221:26)
at w (http://radiant/stonehearth/ui/root/js/libs/ember-1.8.1.min.js:5:23160)
at m (http://radiant/stonehearth/ui/root/js/libs/ember-1.8.1.min.js:4:21008)
at b (http://radiant/stonehearth/ui/root/js/libs/ember-1.8.1.min.js:5:13753)
at a (http://radiant/stonehearth/ui/root/js/libs/ember-1.8.1.min.js:5:12519)
at h (http://radiant/stonehearth/ui/root/js/libs/ember-1.8.1.min.js:5:13415)
at a (http://radiant/stonehearth/ui/root/js/libs/ember-1.8.1.min.js:5:12507)
at y (http://radiant/stonehearth/ui/root/js/libs/ember-1.8.1.min.js:5:17298)
at n.set (http://radiant/stonehearth/ui/root/js/libs/ember-1.8.1.min.js:8:25617)
at Object. (http://radiant/stonehearth/ui/root/js/stonehearth/view.js:128:21)

EDIT: This one is persistent as all get out. It’s flagging everytime I try to lay down a stockpile.