Before Login you must follow the steps on individual devices:
*** Logout the previous account if you are already logged in***
For Android: Clear app data or reinstall the app
For iPhone: Reinstall the app
Smart TV: Logout Previous account. Disconnect the internet and restart the TV.
Web Browser: Clear cache (Ctrl+Shift+Del, go to advanced tab, select “All Time” and then checkmark “Cached image and Date”)