This happens when using discordcalladmin plugin, the category ID is correct

Failed to call hook 'CallAdminCommand' on plugin 'DiscordCallAdmin v0.1.6' (NullReferenceException: Object reference not set to an instance of an object)
at Oxide.Plugins.DiscordCallAdmin.StartLiveChat (System.String playerID) [0x00064] in <f5109f5472644851b661de69a5c350e7>:0
at Oxide.Plugins.DiscordCallAdmin.CallAdminCommand (Oxide.Core.Libraries.Covalence.IPlayer player, System.String command, System.String[] args) [0x00066] in <f5109f5472644851b661de69a5c350e7>:0
at Oxide.Plugins.DiscordCallAdmin.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x00366] in <f5109f5472644851b661de69a5c350e7>:0
at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod method, System.Object[] args) [0x00079] in <70dc8de1abd4423db5f501c6845edf22>:0
at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x000d8] in <ac41dd3599754d448b8c218b34645820>:0
at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in <ac41dd3599754d448b8c218b34645820>:0