Failed to call hook 'OnPluginUnloaded' on plugin 'PermissionsManager v0.0.9' (NullReferenceException: Object reference not set to an instance of an object) at Oxide.Core.Configuration.DynamicConfigFile.get_Item (System.String key) [0x00000] in :0
at Oxide.Plugins.PermissionsManager.CheckCfg[T] (System.String Key, T& var) [0x00006] in :0
at Oxide.Plugins.PermissionsManager.LoadConfigVariables () [0x00000] in :0
at Oxide.Plugins.PermissionsManager.OnServerInitialized () [0x0008b] in :0
at Oxide.Plugins.PermissionsManager.OnPluginUnloaded (Oxide.Core.Plugins.Plugin plugin) [0x00012] in :0
at Oxide.Plugins.PermissionsManager.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x0012e] in :0
at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod method, System.Object[] args) [0x00079] in <80b90e8213db44b29ec2d4111764172c>:0
at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x000d8] in :0
at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in :0

That isn't this plugin, but your configuration appears to be invalid.