Kindle App on Android Tablet – Stalled, Stuck, Infinite Loop, Won’t Open, Circular Loading Icon Never Finishes – How to Fix

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What Worked
Uninstalling and Re-installing Kindle App

What Did Not Work
Closing app and re-opening app
Turning tablet off and then back on again
Settings –> Applications –> Kindle App –> Force Stop

Postscript -> Last night, April 13, 2020, around 11 PM Denver time, Kindle started malfunctioning. It made me re-login repeatedly. It would run for a while, then ask me to login again. I’d login then it’d want me to log in again. Interesting thing though – this post got a number of hits right then. Whatever was going on, it seems to be something from Amazon’s end. It wasn’t just me.