<![CDATA[<b>]]>**%1$s<![CDATA[</b>]]>**'s app is using an incompatible protocol. They need to update their app before you can call them.
Error when your chat partner's app is incompatible in terms of Telegram calls. Can't be reproduced in official clients.
105
**%1$s**のTelegramは通話に対応できない物が使われています。相手にTelegramの更新を依頼してください。
61/105
Transifex,
Oct 13, 2018 at 01:54