Add the Key SECURITY_AUDIT_FAILURE to the variable UC_CLIENT_SETTINGS with the value "HOST_ACCESS","LOGON","OBJECT_ACCESS","USER_PRIVILEGES"
Go to the settings of the Message Window and set the settings marked red:
Now execute the action that caused the error message. In the Message Window there will be messages like these:
The first two lines e.g. show that the user JAC/SUP tried to access the folder PLAYGROUND\JAC, but cannot access it as the Read right is missing.
By this way, you can find out, what access rights are missing to execute an action.