TeamViewer Host asks for password on Android devices

When I install TeamViewer Host (version 14028) on Casio VR7100 (android version 4.2.2) and connect the host to my TeamViewer account there seems to be a 50/50 chance of it asking for a password when I connect to it even if I never set any passwords to my clients. If I delete the client from My Computers list and re-add it, there is still the 50/50 chance of it asking for a password (which I have no idea of what this would be). Does anybody have a solution to this problem?

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