Error

Error #0341: you can't kick out a built-in robot (UIN=0) from a conference UID XXX
 

Error description

You can't exclude Elisa the bot from the conference. If there is such a user (UIN = 0, you can change the name in the server's settings), it means that this conference is an auto-created one. If you want to remove the bot from the conference, delete a conference from a list of auto-created conferences on the server, and create it again in a client application.

 
Problem solution

If you work with MyChat directly by using an official open protocol, check if you specify data correctly in the command.