Console Error on connect new players

everytime a new player join the server in the console i see this error log:

[SmartWarnings] [DisplayUnAcknowledgedWarnings] An error occurred that shouldn't happen for 76561199211749039 when trying to display warnings

System.Collections.Generic.KeyNotFoundException: The given key '76561199211749039' was not present in the dictionary.
at System.Collections.Generic.Dictionary`2[TKey,TValue].get_Item (TKey key) [0x0001e] in <e3aa8db986d7457ca73f10110f1283f5>:0
at Oxide.Plugins.SmartWarnings.GetPlayerData (System.UInt64 userID, System.String name) [0x00019] in /home/container/carbon/plugins/SmartWarnings.cs:264
at Oxide.Plugins.SmartWarnings.DisplayUnAcknowledgedWarnings (Oxide.Core.Libraries.Covalence.IPlayer player) [0x00000] in /home/container/carbon/plugins/SmartWarnings.cs:762

and a error to, if i warn a player : 

[SmartWarnings] [cmdWarnGUI] An unexpected error occurred server_console executed command warn
args: 76561199211749039 33

System.NullReferenceException: Object reference not set to an instance of an object
at Oxide.Plugins.SmartWarnings.WarnPlayer (Oxide.Core.Libraries.Covalence.IPlayer targetPlayer, Oxide.Core.Libraries.Covalence.IPlayer adminPlayer, System.String preset) [0x00021] in /home/container/carbon/plugins/SmartWarnings.cs:562
at Oxide.Plugins.SmartWarnings.cmdWarnGUI (Oxide.Core.Libraries.Covalence.IPlayer player, System.String cmd, System.String[] args) [0x003fa] in /home/container/carbon/plugins/SmartWarnings.cs:547

ah i see the problem!

if i turn mysql off ->no problem

if i turn it on -> problem

and i see why: the plugin save steamid, count,points and warn_date but name are empty and thats the problem, can you fix it?

and if i send a warn with console, the initiator are null 

the thing is, i buy this only for the mysql feature XD

?