errors in the plugin

[Gun game] Saved player data
Failed executing console command 'warmode.choose' in 'War Mode Spawn UI v1.0.3 by mr01sam' [callback] (Object reference not set to an instance of an object)
   at bool UnityEngine.StringEx.IsLower(string str)
   at void Oxide.Core.Libraries.Permission.RemoveUserGroup(string id, string name) in /__w/Carbon/Carbon/Carbon.Core/Carbon.Components/Carbon.Common/src/Oxide/Libraries/Permissions.cs:line 655
   at void Oxide.Plugins.WarMode.SetModeByGroup(string userid, string modeGroup) in /home/container/carbon/plugins/WarMode.cs:line 2282
   at void Oxide.Plugins.WarMode.SetModeByName(string userid, string modeName) in /home/container/carbon/plugins/WarMode.cs:line 2269
   at void Oxide.Plugins.WarModeSpawnUI.CmdChoosePlaystyle(IPlayer player, string command, string[] args) in /home/container/carbon/plugins/WarModeSpawnUI.cs:line 198
   at object System.Reflection.RuntimeMethodInfo.Invoke(object obj, BindingFlags invokeAttr, Binder binder, object[] parameters, CultureInfo culture)
boneReference is null on Skeleton.Wolf

i have cleared all configs and data from data folder for warmode

same result

Loaded plugin WarMode v1.3.9 by mr01sam [508ms]
Loaded plugin WarModePlayers v1.1.3 by Wild Shadow [116ms]
Loaded plugin War Mode Badges v1.0.1 by mr01sam [117ms]
Loaded plugin War Mode Rules UI v1.1.0 by mr01sam [166ms]
Loaded plugin War Mode Spawn UI v1.0.3 by mr01sam [115ms]
Loaded plugin War Mode Admin Panel v1.1.2 by mr01sam [303ms]
Failed to call internal hook 'OnServerInitialized' on plugin 'WarMode v1.3.9' [352240293] (Object reference not set to an instance of an object)
   at bool UnityEngine.StringEx.IsLower(string str)
   at void Oxide.Core.Libraries.Permission.RemoveUserGroup(string id, string name) in /__w/Carbon/Carbon/Carbon.Core/Carbon.Components/Carbon.Common/src/Oxide/Libraries/Permissions.cs:line 655
   at void Oxide.Plugins.WarMode.SetModeByGroup(string userid, string modeGroup) in /home/container/carbon/plugins/WarMode.cs:line 2282
   at void Oxide.Plugins.WarMode.OnUserConnected(IPlayer player) in /home/container/carbon/plugins/WarMode.cs:line 3059
   at void Oxide.Plugins.WarMode.OnServerInitialized() in /home/container/carbon/plugins/WarMode.cs:line 174
   at object Oxide.Plugins.WarMode.InternalCallHook(uint hook, object[] args) in WarMode.cs/Internal:line 594
 Batch completed! OSI on 6 plugins.
Failed executing console command 'warmode.choose' in 'War Mode Spawn UI v1.0.3 by mr01sam' [callback] (Object reference not set to an instance of an object)
   at bool UnityEngine.StringEx.IsLower(string str)
   at void Oxide.Core.Libraries.Permission.RemoveUserGroup(string id, string name) in /__w/Carbon/Carbon/Carbon.Core/Carbon.Components/Carbon.Common/src/Oxide/Libraries/Permissions.cs:line 655
   at void Oxide.Plugins.WarMode.SetModeByGroup(string userid, string modeGroup) in /home/container/carbon/plugins/WarMode.cs:line 2282
   at void Oxide.Plugins.WarMode.SetModeByName(string userid, string modeName) in /home/container/carbon/plugins/WarMode.cs:line 2269
   at void Oxide.Plugins.WarModeSpawnUI.CmdChoosePlaystyle(IPlayer player, string command, string[] args) in /home/container/carbon/plugins/WarModeSpawnUI.cs:line 198
   at object System.Reflection.RuntimeMethodInfo.Invoke(object obj, BindingFlags invokeAttr, Binder binder, object[] parameters, CultureInfo culture)
[Shoppy