MyChat Client error #0291: no access to user personal groups

"Debugging and troubleshooting", "List of MyChat Client errors", "Error #0291".
 
Error

Error #0291: no access to user personal groups
 

Error description

You have no rights for getting the list of your personal user groups and their content.
 

Problem solution

Enable the rule for accessing personal groups on Admin Panel or move a user to a group where these rules are applied.