Heyho,
i get this message everytime since the last update.

Failed to call hook 'OnPlayerChat' on plugin 'ColouredNames v1.3.8' (FormatException: Input string was not in a correct format.)
  at System.Number.StringToNumber (System.String str, System.Globalization.NumberStyles options, System.Number+NumberBuffer& number, System.Globalization.NumberFormatInfo info, System.Boolean parseDecimal) [0x00057] in <a8ed250850854b439cedc18931a314fe>:0 
  at System.Number.ParseInt32 (System.String s, System.Globalization.NumberStyles style, System.Globalization.NumberFormatInfo info) [0x00013] in <a8ed250850854b439cedc18931a314fe>:0 
  at System.Int32.Parse (System.String s, System.IFormatProvider provider) [0x00008] in <a8ed250850854b439cedc18931a314fe>:0 
  at System.Convert.ToInt32 (System.String value) [0x0000b] in <a8ed250850854b439cedc18931a314fe>:0 
  at Oxide.Plugins.ColouredNames.OnPlayerChat (ConsoleSystem+Arg arg) [0x00062] in <26e070653fde43a399321f8f2358eccb>:0 
  at Oxide.Plugins.ColouredNames.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x000b0] in <26e070653fde43a399321f8f2358eccb>: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​

My bad, will update this tomorrow

same error for me

Should be fixed with the 1.3.9 version