Could you try uninstalling the LastPass app, restarting your device then reinstalling? Could you also try logging in on a different network (for example, disabling the Wi-Fi on your device and using a mobile connection to log in or for the opposite, connecting your phone to wi-fi when logging in instead of using the mobile network) to see if you can then log in?
RachelO is a member of the LogMeIn Community Care Team.
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