Last several days I am not able to access my sencha.io hosted app http://suburbview.app.sencha.io/, I keep getting:

404 Not Found

nginx/1.0.9

I have the same issue with development subdomain.
Last several weeks I've noticed numerous times it was unavailable or getting same 404 error but would come back online within few hours, but this has now been going on for 3-4 days? Anyone else has similar issue?
App appears deployed in Sencha.io Dashboard and has previously worked fine.