Cannot reload or direct link to exercise page

[jessamynsmith]

If you have an exercise page up, e.g. http://nodingbat.com/exercises/warmup-1/intMax and you try to reload it, you get a blank input box and there are errors in the console. Trying to directly link to an exercise page fails similarly.

d7347a7….js?meteor_js_resource=true:3 Exception from Tracker afterFlush function: d7347a7….js?meteor_js_resource=true:3 TypeError: Cannot read property 'setup' of undefined at session_set (d7347a7….js?meteor_js_resource=true:283) at d7347a7….js?meteor_js_resource=true:283 at t.Computation._compute (d7347a7….js?meteor_js_resource=true:14) at new t.Computation (d7347a7….js?meteor_js_resource=true:14) at Object.t.autorun (d7347a7….js?meteor_js_resource=true:14) at Template.exerciseItem.rendered (d7347a7….js?meteor_js_resource=true:283) at d7347a7….js?meteor_js_resource=true:49 at Function.e._withTemplateInstanceFunc (d7347a7….js?meteor_js_resource=true:49) at n (d7347a7….js?meteor_js_resource=true:49) at .<anonymous> (d7347a7….js?meteor_js_resource=true:49)