Sometimes you may see the message, "Please rotate your device". This means you device must be in landscape mode in order to progress with the journey.
You can simply rotate your device so its landscape and the screen should rotate also, if your screen does not rotate with the device, then you may have rotate lock on.
You can find more information below.
IOS devices
If you see a "Browser not supported :(" message, then this means we currently don't support the device you are on (more here)
If you see a "Not supported :(" message, then this means your device is more than likely to small.