Getting this error

(18:41:16) | Failed to call hook 'cmdRewards' on plugin 'ServerRewards v0.4.67' (ArgumentException: Requested value 'Electrical' was not found.)
at System.Enum+EnumResult.SetFailure (System.Enum+ParseFailureKind failure, System.String failureMessageID, System.Object failureMessageFormatArgument) [0x00023] in <a8ed250850854b439cedc18931a314fe>:0
at System.Enum.TryParseEnum (System.Type enumType, System.String value, System.Boolean ignoreCase, System.Enum+EnumResult& parseResult) [0x0017a] in <a8ed250850854b439cedc18931a314fe>:0
at System.Enum.Parse (System.Type enumType, System.String value, System.Boolean ignoreCase) [0x00010] in <a8ed250850854b439cedc18931a314fe>:0
at Oxide.Plugins.ServerRewards.cmdRewards (BasePlayer player, System.String command, System.String[] args) [0x0079e] in <f39360a19fae43198074bbef199a03a4>:0
at Oxide.Plugins.ServerRewards.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x01346] in <f39360a19fae43198074bbef199a03a4>:0
at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod method, System.Object[] args) [0x00079] in <9affce1cd15c4ec183941adef8db1722>:0
at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x000d8] in <4452f821def6406d834e4149849fe7ea>:0
at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in <4452f821def6406d834e4149849fe7ea>:0