Error when synchronize CouchBase Lite 1.3.1

I have a Client Xamarin, this synchronize with SyncGateway ver. 1.3.1 and CouchbaseServer 3.1.0. The target of simulator iOS(10.1).
I use code of examples of implementations for c#.

2016-11-22 12:52:07.958 CouchBaseClient[7042:512557] 5638 - 5635
INFO) SYNC (Puller): [12] 2016-11-22 12:52:07.958-06:00 Puller a11a92c3-ea7a-46f2-8995-2af492b94027 queued 3 remote revisions from seq=5642 (3 in bulk, 0 individually)
INFO) SYNC (Puller): [12] 2016-11-22 12:52:07.959-06:00 a11a92c3-ea7a-46f2-8995-2af492b94027 bulk-fetching 3 remote revisions…
INFO) CHANGE TRACKER (ChangeTracker): [11] 2016-11-22 12:52:07.961-06:00 Resuming SocketChangeTracker[hdidigital]…
ERROR) NewtonsoftJsonSerializer: [11] 2016-11-22 12:52:08.727-06:00 Error deserializing from streaming parser, throwing CouchbaseLiteException:
Newtonsoft.Json.JsonReaderException: Invalid character after parsing property name. Expected ‘:’ but got: WARN) CHANGE TRACKER (OneShotOrLongPollLogic): [11] 2016-11-22 12:52:08.729-06:00 Failure during change tracker JSON parsing:
Couchbase.Lite.CouchbaseLiteException: Error deserializing from streaming parser —> Newtonsoft.Json.JsonReaderException: Invalid character after parsing property name. Expected ‘:’ but got: ERROR) NewtonsoftJsonSerializer: [7] 2016-11-22 12:52:08.813-06:00 Error deserializing json from stream, throwing CouchbaseLiteException:
Newtonsoft.Json.JsonReaderException: Unexpected character encountered while parsing value: H. Path ‘’, line 0, position 0.
at Newtonsoft.Json.JsonTextReader.ParseValue () [0x002c2] in <0d551458bd0a4e398947735723526f43>:0
at Newtonsoft.Json.JsonTextReader.ReadInternal () [0x00043] in <0d551458bd0a4e398947735723526f43>:0
at Newtonsoft.Json.JsonTextReader.Read () [0x00007] in <0d551458bd0a4e398947735723526f43>:0
at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.ReadForType (Newtonsoft.Json.JsonReader reader, Newtonsoft.Json.Serialization.JsonContract contract, System.Boolean hasConverter) [0x0003d] in <0d551458bd0a4e398947735723526f43>:0
at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.Deserialize (Newtonsoft.Json.JsonReader reader, System.Type objectType, System.Boolean checkAdditionalContent) [0x00029] in <0d551458bd0a4e398947735723526f43>:0
ERROR) SYNC (BulkDownloader): [7] 2016-11-22 12:52:08.814-06:00 Exception while processing bulk download response:
Couchbase.Lite.CouchbaseLiteException: Error deserializing json from stream —> Newtonsoft.Json.JsonReaderException: Unexpected character encountered while parsing value: H. Path ‘’, line 0, position 0.
at Newtonsoft.Json.JsonTextReader.ParseValue () [0x002c2] in <0d551458bd0a4e398947735723526f43>:0
at Newtonsoft.Json.JsonTextReader.ReadInternal () [0x00043] in <0d551458bd0a4e398947735723526f43>:0
at Newtonsoft.Json.JsonTextReader.Read () [0x00007] in <0d551458bd0a4e398947735723526f43>:0
at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.ReadForType (Newtonsoft.Json.JsonReader reader, Newtonsoft.Json.Serialization.JsonContract contract, System.Boolean hasConverter) [0x0003d] in <0d551458bd0a4e398947735723526f43>:0
at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.Deserialize (Newtonsoft.Json.JsonReader reader, System.Type objectType, System.Boolean checkAdditionalContent) [0x00029] in <0d551458bd0a4e398947735723526f43>:0
— End of inner exception stack trace —
at Couchbase.Lite.NewtonsoftJsonSerializer.Deserialize[T] (System.IO.Stream json) [0x0003e] in /Users/jenkins/jenkins/workspace/couchbase-lite-net-build@2/1.3.1/iOS/couchbase-lite-net/src/Couchbase.Lite.Shared/Util/ContractedDictionary.cs:302
at Couchbase.Lite.ObjectWriter.ReadValue[T] (System.IO.Stream jsonStream) [0x00000] in /Users/jenkins/jenkins/workspace/couchbase-lite-net-build@2/1.3.1/iOS/couchbase-lite-net/src/Couchbase.Lite.Shared/Replication/BulkDownloader.cs:70
at Couchbase.Lite.Replicator.BulkDownloader+c__AnonStorey1.<>m__0 (System.Threading.Tasks.Task`1[TResult] t) [0x00000] in /Users/jenkins/jenkins/workspace/couchbase-lite-net-build@2/1.3.1/iOS/couchbase-lite-net/src/Couchbase.Lite.Shared/Util/NonNullDictionary.cs:60
INFO) SYNC (Replication): [7] 2016-11-22 12:52:08.817-06:00 Puller a11a92c3-ea7a-46f2-8995-2af492b94027 progress 5638 / 5638
INFO) SYNC (Replication): [7] 2016-11-22 12:52:08.818-06:00 NotifyChangeListeners (5638/5638, state=Running (batch=0, net=0))

The error is Firewall.