"Debugging and troubleshooting", "List of MyChat Client errors", "Error #0284".
 
Error

Error #0284: impossible to create a personal group of users. The users list has incorrect data

 

Error description

You are trying to create a personal group that is linked to a particular person, but the list of users has a UIN 0 (buit-in bot), your own UIN, it has non-existing UINs, or the list was created in a wrong way (must contain only numeric UINs divided by commas).

 

Problem solution

Send a correct list of users, or an empty string instead.