A new session could not be created. (Original error: com.hurix.kitaboo.cloudreader/.LaunchActivity never started

A new session could not be created. (Original error: com.hurix.kitaboo.cloudreader/.LaunchActivity never started.

10 out of 9 times we are getting this error.really frustrated not able to do anything

read in logs more. what activity is visible instead of “.LaunchActivity”