and message:
Assertion failure: No project JSON model available
Stack trace:
assert2((void 0),"No project JSON model available")@http://localhost:50000/preview_prelude.js:12
()@http://localhost:50000/preview.js:116
([object HTMLCanvasElement])@http://localhost:50000/preview.js:92
("c2canvas")@http://localhost:50000/preview.js:10
((function (a, b) {return new e.fn.init(a, b, h);}))@http://localhost:50000/preview.html:100
([object HTMLDocument],[object Array])@http://localhost:50000/jquery-1.6.3.min.js:2
()@http://localhost:50000/jquery-1.6.3.min.js:2
([object Event])@http://localhost:50000/jquery-1.6.3.min.js:2