Failed to call hook 'OnPlayerChat' on plugin 'UFilter v5.1.1' (NullReferenceException: Object reference not set to an instance of an object)

at Oxide.Plugins.UFilter.<Profanities>m__3 (System.String w) [0x00000] in <f2151ede5bc3477a8542dd011daf259b>:0

at System.Linq.Enumerable+WhereArrayIterator`1[TSource].ToArray () [0x00022] in <351e49e2a5bf4fd6beabb458ce2255f3>:0

at System.Linq.Enumerable.ToArray[TSource] (System.Collections.Generic.IEnumerable`1[T] source) [0x0001f] in <351e49e2a5bf4fd6beabb458ce2255f3>:0

at Oxide.Plugins.UFilter.Profanities (System.String text) [0x0001c] in <f2151ede5bc3477a8542dd011daf259b>:0

at Oxide.Plugins.UFilter.ProcessText (System.String text, Oxide.Core.Libraries.Covalence.IPlayer player) [0x00012] in <f2151ede5bc3477a8542dd011daf259b>:0

at Oxide.Plugins.UFilter.HandleChat (Oxide.Core.Libraries.Covalence.IPlayer player, System.String message) [0x00013] in <f2151ede5bc3477a8542dd011daf259b>:0

at Oxide.Plugins.UFilter.OnPlayerChat (BasePlayer basePlayer, System.String message, ConVar.Chat+ChatChannel channel) [0x00000] in <f2151ede5bc3477a8542dd011daf259b>:0

at Oxide.Plugins.UFilter.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x00145] in <f2151ede5bc3477a8542dd011daf259b>:0

at Oxide.Plugins.CSharpPlugin.InvokeMethod (Oxide.Core.Plugins.HookMethod method, System.Object[] args) [0x00079] in <60c318df79ed41688ea59335e48d61ad>:0

at Oxide.Core.Plugins.CSPlugin.OnCallHook (System.String name, System.Object[] args) [0x000d8] in <dfcb48ea05694263bbc08e62a39c274c>:0

at Oxide.Core.Plugins.Plugin.CallHook (System.String hook, System.Object[] args) [0x00060] in <dfcb48ea05694263bbc08e62a39c274c>:0

Im getting this error every time someone writes and words are not being filtered. Is there any solution? Thank you