privilege::id requests a privilege by its id.
In the following example, the id with value 10 maps to the SeLoadDriverPrivilege privilege (like the driver command).
mimikatz # privilege::id 10
Privilege '10' OK
Depending on the defined privilege number, the following error might be raised:
mimikatz # privilege::id 1
ERROR kuhl_m_privilege_simple ; RtlAdjustPrivilege (1) c0000061
mimikatz # privilege::id 2
ERROR kuhl_m_privilege_simple ; RtlAdjustPrivilege (2) c0000061
This indicates that Mimikatz is not running with administrative privileges. UAC is also a case to consider when GUI access is not possible.