At a glance, are you trying to create a sound.Sound object in a code component? Those don’t seem to work, and could be the source of the issue: Type Error: Cannot read property '_psychoJS' of undefined
Sound_task also seems to define a sound as ‘A’, which doesn’t work online. Sounds have to be sound files.
As a general rule, when you get these unspecified errors, the most informative thing you can do is open your browser’s JS console (in Chrome, it can be found under view->developer), and see if you get more specific error messages there.