Installation has been done successfully, bot is answering to direct messages and sending QR code for /contactQR command, so I can verify it scanning it with a phone the same way it is done with a regular user.
I can add it to verified group also now. Though when someone sends a message in a verified group - bot answers to the one who added it to the group as expected, but others in a verified group receive UNCHECKED … – [This message was encrypted for another setup.]…
May I ask for your advise how to fix it?