I have already successfully installed Mozilla VPN on two of my Windows 10 devices. I have downloaded and installed the Android version to my phone. The first screen has a button "Get started", which I click. This takes me to a Mozilla Sign In screen, where I click the button "Sign in". I am now taken back the the Get started screen.....and so on in a loop. I have tried uninstalling the app and starting again. This does not work. Any ideas?