Somebody could help me? This appears to me when I am going to change the work to one of my villagers. 
release-707 (x32)[M]
Uncaught TypeError: Cannot read property ‘stonehearth:jobs:worker’ of undefined
TypeError: Cannot read property ‘stonehearth:jobs:worker’ of undefined
at SVGTextElement. (http://radiant/stonehearth/ui/game/promotion_tree/promotion_tree.js:234:50)
at SVGTextElement.arguments.length.each.function.n.textContent (http://radiant/stonehearth/ui/root/js/libs/d3.min.js:3:9640)
at http://radiant/stonehearth/ui/root/js/libs/d3.min.js:3:12037
at P (http://radiant/stonehearth/ui/root/js/libs/d3.min.js:1:4065)
at Array.pa.each (http://radiant/stonehearth/ui/root/js/libs/d3.min.js:3:12012)
at Array.pa.text (http://radiant/stonehearth/ui/root/js/libs/d3.min.js:3:9595)
at n._buildTree (http://radiant/stonehearth/ui/game/promotion_tree/promotion_tree.js:233:11)
at n._updateTalismanData (http://radiant/stonehearth/ui/game/promotion_tree/promotion_tree.js:360:15)
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)