I am building canvas app. It always started good, but aftes some time development app do not start. It Weires Getting data... and stuck. If i start app from monitor it do not bring any errors.
In development mode all is fine an app is playing and does not give any errors.
I tried with different accunts and with diferent browsers and same.
I cannot start app in published mode anymore.

How can I fix this? How can I find reason why app is not starting?