Game Won't Launch

When I try to open Stonehearth I get a black screen and this bug report thingy:

release-779 (x64)[M]
Uncaught TypeError: Cannot read property ‘progress’ of undefined
TypeError: Cannot read property ‘progress’ of undefined
at SimpleClass.progress (http://radiant/radiant/js/radiant/trace.js:24:28)
at SimpleClass._createGetterTrace (http://radiant/stonehearth/ui/game/traces/population.js:82:14)
at http://radiant/stonehearth/ui/game/traces/population.js:34:21
at j (http://radiant/radiant/js/external/jquery-2.1.4.min.js:2:26925)
at Object.fireWith [as resolveWith] (http://radiant/radiant/js/external/jquery-2.1.4.min.js:2:27738)
at e.(anonymous function) (http://radiant/radiant/js/external/jquery-2.1.4.min.js:2:28718)
at foward_fn (http://radiant/radiant/js/radiant/object.js:144:22)
at finish_fn (http://radiant/radiant/js/radiant/object.js:149:16)
at dispatch (http://radiant/radiant/js/external/jquery-2.1.4.min.js:3:6466)
at r.handle (http://radiant/radiant/js/external/jquery-2.1.4.min.js:3:3241)

Could it be Mods I have downloaded? Would a list of them help?

Yes, most probably mods. The default game should run with no problems at the start.