Vistar-Private Video Chat&Call funktioniert nicht

Why Vistar is the best live video chat app for you? - Live chat with pretty girls or handsome boys from nearby or all over the world. - Incredible effects, show yourself to get more attention. - Don't be afraid of losing memorable moments of friendship, you can keep the chat history forever. - Easy and quick login with mobile, Facebook and Google account. - Connect with other people at anytime and anywhere. - All personal information is securely stored and not sold nor shared to third parties. - Information other than what you write directly on the profile cannot be seen by other users. - Your detailed location is not shared with any other user or third parties. - Please take caution when delivering sensitive information, because you are responsible for the information you provide to the other party on Vistar.  Vistar is a popular strangers chatting app by private live video chat or voice talk to make new friends nearby and globally!  Easily discover hot and new friends then make an instant live video / voice call to meet someone online!  Don't wait – Join Vistar, live your life, gain many fans, receive gifts and be a star easily.  Any feedback is warmly welcomed and highly appreciated!