Error

Error #0340: unacceptable information with the conference UID %d
 

Error description

It turned out, that this operation type is unacceptable for this conference. For example, you mistakenly delete a group of users from a conference which is not an auto-created (the owner of this conference is not Elisa the bot with UIN = 0).

 
Problem solution

This issues are possible if you work with MyChat directly by using an official open protocol and specify data incorrectly for some commands.