Working Android build started crashing suddenly with FATAL EXCEPTION at time of login?

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We have build apk using kony Visualizer 8.4.52 , We have tested app where all functionality worked fine. But Now suddenly app crashing now when trying to Login.

In iOS app not crashing but showing loading indicator .

FATAL EXCEPTION: AsyncTask #5

Process: com.test.myApp, PID: 13146

java.lang.RuntimeException: An error occurred while executing doInBackground()

Please suggest if anyone has faced this kind of issue earlier.

@Johnvthon Phelps​ initial analysis is that you must be getting a html page a network response and you are trying to json parse the response resulting in exception

A complete log in debug mode from app launch may help further