"Unexpected character encountered while parsing value" on load

On my very first load I'm receiving this error. I haven't changed any configuration files.

Quote

Loaded plugin Referral System v1.0.1 by DezLife
Web request callback raised an exception (JsonReaderException: Unexpected character encountered while parsing value: <. Path '', line 0, position 0.)
  at Newtonsoft.Json.JsonTextReader.ParseValue () [0x002b3] in <2ae3f091decd4989b3c4d466e6eb5985>:0
  at Newtonsoft.Json.JsonTextReader.Read () [0x0004c] in <2ae3f091decd4989b3c4d466e6eb5985>:0       1kb/s in, 7kb/s out
  at Newtonsoft.Json.Linq.JObject.Load (Newtonsoft.Json.JsonReader reader, Newtonsoft.Json.Linq.JsonLoadSettings settings) [0x00013] in <2ae3f091decd4989b3c4d466e6eb5985>:0
  at Newtonsoft.Json.Linq.JObject.Parse (System.String json, Newtonsoft.Json.Linq.JsonLoadSettings settings) [0x0000c] in <2ae3f091decd4989b3c4d466e6eb5985>:0
  at Newtonsoft.Json.Linq.JObject.Parse (System.String json) [0x00000] in <2ae3f091decd4989b3c4d466e6eb5985>:0
  at Oxide.Plugins.ReferralSystem+<SteamAvatarAdd>c__AnonStorey1.<>m__0 (System.Int32 code, System.String response) [0x00000] in <9a22ac0aab0249d6b384cffae874b7e5>:0
  at Oxide.Core.Libraries.WebRequests+WebRequest.<OnComplete>b__42_0 () [0x00034] in <50629aa0e75d4126b345d8d9d64da28d>:                                                                    

Checked lang and config file in json validator. It doesn't find anything,

Changed Status from Pending to Closed

Changed Fixed In to Next Version