The problem has been occurring since a few day ago. Also I downloaded sample custom code from github link, and after editing keys upload it to AppHQ. Problem still exists with the error 'somethin went wrong'.
The only time I dont receive the problem is on a few oldest custom codes which may be created by java 1.6. Maybe java sdk version related to this? Also keep in mind that I am using latest Intellij IDEA to package jar.
This problem has downside effect on the application, so could you please take a look at it urgently? thanks