Android App source error- Could not obtain source:

App source giving following error -Could not obtain source: {“cause”:{“sessionId”:“3ee45bdf-8f8c-4b15-bdb9-c5ace92f89d0”,“status”:13,“value”:{“message”:“An unknown server-side error occurred while processing the command.”}},“jsonwire-error”:{“detail”:“An unknown server-side error occurred while processing the command.”,“status”:13,“summary”:“UnknownError”},“message”:"[source()] Error response status: 13, , UnknownError - An unknown server-side error occurred while processing the command. Selenium error: An unknown server-side error occurred while processing the command.",“status”:13}

Appium version 1.5