Hello I am having this message in console

I checked stat_log from server and i get this line

[2021-01-27 02:35:57] [AppID 252490] CAPIJobStoreUserStats::BInit() - tabling this request due to rate-limiting

Every time I type the command /karma top or /karma bottom, my question is if this affects the server over time or is there a solution.

Failed to call hook 'karmaCmd' on plugin 'KarmaSystem v1.1.0' (NullReferenceException: Object reference not set to an instance of an object)
at Oxide.Plugins.KarmaSystem.karmaCmd (Oxide.Core.Libraries.Covalence.IPlayer player, System.String command, System.String[] args) [0x0011f] in <079f940ecf7744219e5fa3db5e6f9673>:0
at Oxide.Plugins.KarmaSystem.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x0033c] in <079f940ecf7744219e5fa3db5e6f9673>:0
at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod method, System.Object[] args) [0x00079] in <80b90e8213db44b29ec2d4111764172c>:0
at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x000d8] in <ec05e0208c9149bba43236ca58fea105>:0
at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in <ec05e0208c9149bba43236ca58fea105>:0