Bot doesn't have permission to send messages
Publication in Telegram is done via a bot. To send messages and media content, it must be an admin of the channel with the necessary permissions.
Possible reasons
- The channel owner has restricted the bot's permissions.
- The bot is not an admin or doesn't have permission to send messages and media content.
What to do?
- Open Telegram and go to the channel.
- Go to "Settings" → "Administrators."
- Find the bot and enable permissions to send messages and media.
- If the bot isn't there, add it as an admin.