<![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**'s app använder ett inkompatibelt protokoll. Dennes app måste uppdateras innan du kan ringa upp.
104/105
Erik Lennartsson,
Mar 30, 2021 at 20:48