Failed to initialize plugin 'UniversalUI v2.1.4' (JsonReaderException: Unexpected character encountered while parsing value: {. Path 'buttons', line 2, position 14.)
  at Newtonsoft.Json.JsonTextReader.ReadStringValue (Newtonsoft.Json.ReadType readType) [0x00366] in <45c13f2b01574d8b82248736e42013a4>:0 
  at Newtonsoft.Json.JsonTextReader.ReadAsString () [0x00000] in <45c13f2b01574d8b82248736e42013a4>:0 
  at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.ReadForType (Newtonsoft.Json.JsonReader reader, Newtonsoft.Json.Serialization.JsonContract contract, System.Boolean hasConverter) [0x00077] in <45c13f2b01574d8b82248736e42013a4>:0 
  at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.PopulateDictionary (System.Collections.IDictionary dictionary, Newtonsoft.Json.JsonReader reader, Newtonsoft.Json.Serialization.JsonDictionaryContract contract, Newtonsoft.Json.Serialization.JsonProperty containerProperty, System.String id) [0x00262] in <45c13f2b01574d8b82248736e42013a4>:0 
  at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateObject (Newtonsoft.Json.JsonReader reader, System.Type objectType, Newtonsoft.Json.Serialization.JsonContract contract, Newtonsoft.Json.Serialization.JsonProperty member, Newtonsoft.Json.Serialization.JsonContainerContract containerContract, Newtonsoft.Json.Serialization.JsonProperty containerMember, System.Object existingValue) [0x002a8] in <45c13f2b01574d8b82248736e42013a4>:0 
  at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateValueInternal (Newtonsoft.Json.JsonReader reader, System.Type objectType, Newtonsoft.Json.Serialization.JsonContract contract, Newtonsoft.Json.Serialization.JsonProperty member, Newtonsoft.Json.Serialization.JsonContainerContract containerContract, Newtonsoft.Json.Serialization.JsonProperty containerMember, System.Object existingValue) [0x0006d] in <45c13f2b01574d8b82248736e42013a4>:0 
  at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.Deserialize (Newtonsoft.Json.JsonReader reader, System.Type objectType, System.Boolean checkAdditionalContent) [0x000d9] in <45c13f2b01574d8b82248736e42013a4>:0 
  at Newtonsoft.Json.JsonSerializer.DeserializeInternal (Newtonsoft.Json.JsonReader reader, System.Type objectType) [0x00053] in <45c13f2b01574d8b82248736e42013a4>:0 
  at Newtonsoft.Json.JsonSerializer.Deserialize (Newtonsoft.Json.JsonReader reader, System.Type objectType) [0x00000] in <45c13f2b01574d8b82248736e42013a4>:0 
  at Newtonsoft.Json.JsonConvert.DeserializeObject (System.String value, System.Type type, Newtonsoft.Json.JsonSerializerSettings settings) [0x0002d] in <45c13f2b01574d8b82248736e42013a4>:0 
  at Newtonsoft.Json.JsonConvert.DeserializeObject[T] (System.String value, Newtonsoft.Json.JsonSerializerSettings settings) [0x00000] in <45c13f2b01574d8b82248736e42013a4>:0 
  at Newtonsoft.Json.JsonConvert.DeserializeObject[T] (System.String value) [0x00000] in <45c13f2b01574d8b82248736e42013a4>:0 
  at Oxide.Core.Libraries.Lang.GetMessageFile (System.String plugin, System.String lang) [0x00067] in <ec05e0208c9149bba43236ca58fea105>:0 
  at Oxide.Core.Libraries.Lang.RegisterMessages (System.Collections.Generic.Dictionary`2[TKey,TValue] messages, Oxide.Core.Plugins.Plugin plugin, System.String lang) [0x00032] in <ec05e0208c9149bba43236ca58fea105>:0 
  at Oxide.Plugins.UniversalUI.Loaded () [0x00000] in <8d75109b90674e3fadb351a377b55691>:0 
  at Oxide.Plugins.UniversalUI.DirectCallHook (System.String name, System.Object& ret, System.Object[] args) [0x0009c] in <8d75109b90674e3fadb351a377b55691>: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 <ec05e0208c9149bba43236ca58fea105>:0 
  at Oxide.Plugins.CSharpPlugin.HandleAddedToManager (Oxide.Core.Plugins.PluginManager manager) [0x0006e] in <80b90e8213db44b29ec2d4111764172c>:0

Not sure why this is happening. It shows everything is if in both VSC and jsonlint.

So I guess there is an error in the config somewhere. It's just not showing anywhere. And no. Line 2 position 14 is fine. There's nothing wrong there.

I have an old config and it's loading up fine. I just have to rebuild.

This error would indicate an error with your oxide/lang file.

Yeah. Sorry about that. I forgot to come back and mention I figured that part out. I always forget to check the language files. I just generated a new file and everything works as it should now.