Google Play Error code “-504”

Question

I\'m facing an annoying issue with Google Play over and over again. There are some apps (currently Deezer and Teamtreehouse) which can\'t be updated/installed due this error:

Answer 1

I had this error occur recently in my app. But only for all < 8.0 devices. It worked fine on 8.0. It ended up being because a new service I added had capital letters in the service name.