<![CDATA[<b>]]>**%1$s<![CDATA[</b>]]>**'s app is using an incompatible protocol. They need to update their app before you can call them.
Error when your chat partner's app is incompatible in terms of Telegram calls. Can't be reproduced in official clients.
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Aplikace uživatele **%1$s** používá nekompatibilní protokol. Aby se hovor mohl uskutečnit, musí aplikaci nejdříve aktualizovat.
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Jirka,
Oct 27, 2018 at 05:52