I was collecting cards to trade with my partner on TCG Pocket, than I had an authentication error and it wouldn’t let me in the game. I tried everything I could think of, and kept getting the error. Cleared cache, restarted phone… nothing.
So I look online and the solution is to uninstall and reinstall. Sure thing, I do that with other games all the time!
Lost my account and all my cards. Luckily I never spent money on it.