Error Console & impossible to restart

Good evening, I just had this error on the console when rebooting the server. I don't see where this could come from. Knowing that I didn't touch it. Thank you

o.reload XPerience
[CSharp] Started Oxide.Compiler v successfully
XPerience was compiled successfully in 2763ms
Unloaded plugin XPerience v1.8.200 by MACHIN3
[XPerience] Configuration changes saved to XPerience.json
Failed to call hook 'OnServerInitialized' on plugin 'XPerience v1.8.200' (FormatException: Input string was not in a correct format.)
  at System.Text.StringBuilder.AppendFormatHelper (System.IFormatProvider provider, System.String format, System.ParamsArray args) [0x000b2] in <2161c9885dd04ff291b79db9349c4b9b>:0
  at System.String.FormatHelper (System.IFormatProvider provider, System.String format, System.ParamsArray args) [0x00023] in <2161c9885dd04ff291b79db9349c4b9b>:0
  at System.String.Format (System.String format, System.Object[] args) [0x00020] in <2161c9885dd04ff291b79db9349c4b9b>:0
  at Oxide.Plugins.XPerience.XPLang (System.String key, System.String id, System.Object[] args) [0x0000e] in <a74e8aa99b314de5a25cc6699074db34>:0
  at Oxide.Plugins.XPerience.PlayerStatsChat (BasePlayer player) [0x00008] in <a74e8aa99b314de5a25cc6699074db34>:0
  at Oxide.Plugins.XPerience.OnPlayerConnected (BasePlayer player) [0x00120] in <a74e8aa99b314de5a25cc6699074db34>:0
  at System.Collections.Generic.List`1[T].ForEach (System.Action`1[T] action) [0x0001e] in <2161c9885dd04ff291b79db9349c4b9b>:0
  at Oxide.Plugins.XPerience.OnServerInitialized () [0x0093a] in <a74e8aa99b314de5a25cc6699074db34>:0
  at Oxide.Plugins.XPerience.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x02d66] in <a74e8aa99b314de5a25cc6699074db34>:0
  at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod method, System.Object[] args) [0x00079] in <87ce9ac9776a48658bc55eae6debe38b>:0
  at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x000d8] in <18d4f19bbc844191b11ed9e69284d09b>:0
  at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in <18d4f19bbc844191b11ed9e69284d09b>:0
Calling 'OnServerInitialized' on 'XPerience v1.8.200' took 170ms
Loaded plugin XPerience v1.8.200 by MACHIN3

try deleting the language file and reloading the plugin. It looks like something is missing within the language section

Changed Status from Pending to Work in Progress

Changed Status from Work in Progress to No Response