Getting this while trying to block the spawn command.

(20:37:52) | Failed to call hook 'OnServerCommand' on plugin 'CommandBlock v0.4.0' (FormatException: Index (zero based) must be greater than or equal to zero and less than the size of the argument list.)
  at System.Text.StringBuilder.AppendFormatHelper (System.IFormatProvider provider, System.String format, System.ParamsArray args) [0x000ff] in <eae584ce26bc40229c1b1aa476bfa589>:0 
  at System.String.FormatHelper (System.IFormatProvider provider, System.String format, System.ParamsArray args) [0x00023] in <eae584ce26bc40229c1b1aa476bfa589>:0 
  at System.String.Format (System.String format, System.Object[] args) [0x00020] in <eae584ce26bc40229c1b1aa476bfa589>:0 
  at Oxide.Plugins.CommandBlock.GetLang (System.String langKey, System.String playerId, System.Object[] args) [0x0000e] in <6682dc299b77498a9843cc74b23cadbe>:0 
  at Oxide.Plugins.CommandBlock.OnServerCommand (System.String command, System.String[] args) [0x0001d] in <6682dc299b77498a9843cc74b23cadbe>:0 
  at Oxide.Plugins.CommandBlock.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x00171] in <6682dc299b77498a9843cc74b23cadbe>:0 
  at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod method, System.Object[] args) [0x00079] in <31122a27a2414cd799150f8677cf39d4>:0 
  at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x000d8] in <0fbce81d88d64454b3e7abb24df7026b>:0 
  at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in <0fbce81d88d64454b3e7abb24df7026b>:0

Did you change your lang file for the plugin and remove anything?

I removed the lang file to upgrade to newest version after starting to get that error figuring that was it but it wasn't still had same thing. Just added the one command wanted to block and that was it. Whenever someone uses that command that error message shows up. Reverted back to the older version for now as needed the command blocked, but would like to block the arguments so I'd like to get this version working