Cheat sheet crash log

Error setting value to 'BannedNPCs' on 'CheatSheet.ServerConfiguration'.
   at Newtonsoft.Json.Serialization.DynamicValueProvider.SetValue(Object target, Object value)
   at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.SetPropertyValue(JsonProperty property, JsonConverter propertyConverter, JsonContainerContract containerContract, JsonProperty containerProperty, JsonReader reader, Object target)
   at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.PopulateObject(Object newObject, JsonReader reader, JsonObjectContract contract, JsonProperty member, String id)
   at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateObject(JsonReader reader, Type objectType, JsonContract contract, JsonProperty member, JsonContainerContract containerContract, JsonProperty containerMember, Object existingValue)
   at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateValueInternal(JsonReader reader, Type objectType, JsonContract contract, JsonProperty member, JsonContainerContract containerContract, JsonProperty containerMember, Object existingValue)
   at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.Deserialize(JsonReader reader, Type objectType, Boolean checkAdditionalContent)
   at Newtonsoft.Json.JsonSerializer.DeserializeInternal(JsonReader reader, Type objectType)
   at Newtonsoft.Json.JsonConvert.DeserializeObject(String value, Type type, JsonSerializerSettings settings)
   at Newtonsoft.Json.JsonConvert.DeserializeObject[T](String value, JsonSerializerSettings settings)
   at Newtonsoft.Json.JsonConvert.DeserializeObject[T](String value)
   at CheatSheet.ConfigurationLoader.Initialized() in D:\Documents\My Games\Terraria/ModLoader\Mod Sources\CheatSheet\Configuration.cs:line 50
   at CheatSheet.CheatSheet.PostSetupContent() in D:\Documents\My Games\Terraria/ModLoader\Mod Sources\CheatSheet\CheatSheet.cs:line 135
   at Terraria.ModLoader.ModLoader.do_Load(Object threadContext)

Inner Exception:
Value cannot be null.
Parameter name: key
   at System.Collections.Generic.Dictionary`2.FindEntry(TKey key)
   at System.Collections.Generic.Dictionary`2.TryGetValue(TKey key, TValue& value)
   at Terraria.ModLoader.ModLoader.GetMod(String name)
   at CheatSheet.ServerConfiguration.<>c.<set_BannedNPCs>b__2_0(JSONNPC jsonnpc) in D:\Documents\My Games\Terraria/ModLoader\Mod Sources\CheatSheet\Configuration.cs:line 131
   at System.Linq.Enumerable.WhereSelectArrayIterator`2.MoveNext()
   at System.Collections.Generic.List`1..ctor(IEnumerable`1 collection)
   at System.Linq.Enumerable.ToList[TSource](IEnumerable`1 source)
   at CheatSheet.ServerConfiguration.set_BannedNPCs(JSONNPC[] value) in D:\Documents\My Games\Terraria/ModLoader\Mod Sources\CheatSheet\Configuration.cs:line 130
   at SetBannedNPCs(Object , Object )
   at Newtonsoft.Json.Serialization.DynamicValueProvider.SetValue(Object target, Object value)