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 think the issue is caused by linking the app to SD card.

This is what worked for me:

1. Move (not Link) the app to SD card
2. After you've moved the app to SD card, Move it back to Phone
3. Now you can update the app via App Store and link back to SD card if you want.

FYI: You must repeat this process every-time you want update the app.