We recently encountered a new issue with the apps platform on which Lupa is built that will affect a few Android users after they receive a Lupa update from the Play Store. They experience a repeated crash on startup, leaving them with no access. We are working with our platform provider to address this issue.
Uninstalling and reinstalling Lupa is currently the only workaround. You will not lose your progress or vocab lists by doing this.
If you are still experiencing issues after the reinstall, please contact us on chat or at firstname.lastname@example.org and we'll look into it.