Application won't install from Play store in LAVA IRIS x8

I build an android application which is having GCM integration. When I upload the application in the play store; some of the mobiles like "LAVA IRIS x8 with OS version 5.1.1 - lollipop" not able to download from the playstore showing message as "Application can not be installed Error code : 504"

Even more when I try to run from ADB android Studio shows same issue. Please anyone can help me out as this issue I am facing in my all application which I developed ASAP ?

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