Neu Exception bei Abgleich JTL-WaWi <-> Magento-Shop

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Unmittelbar nach dem starten des Datenabgleiches wird selbiger mit einer Fehlermeldung abgebrochen.
Die Version der WaWi ist 1.1.3.0 mit dem aktuellsten Magento- Connector.


Das Log besagt folgendes:

JTL-Wawi: StartForm()
JTL-Wawi: MainWindow != null
Endpoint version: 1.4.5.0
Wawi-Version: 1.1.3.0
JTL-Wawi: Sync start
JTL-Wawi: Licence is valid
JTL-Wawi: InitCall OK
JTL-Wawi: Initialize model getters...
>>> Category.statistic: {
"method": "Category.statistic",
"params": {
"limit": 0,
"filters": {}
},
"jtlrpc": "2.0",
"id": "db6f2abb713b4913b497bcf6e50af19a"
}
<<< Category.statistic: {"result":{"available":50,"controllerName":"category"},"error":null,"jtlrpc":"2.0","id":"db6f2abb713b4913b497bcf6e50af19a"}
(671,763 milliseconds)
>>> Product.statistic: {
"method": "Product.statistic",
"params": {
"limit": 0,
"filters": {}
},
"jtlrpc": "2.0",
"id": "494c4facc1524bc8a0d8f6e8ee97efe2"
}
<<< Product.statistic: {"result":{"available":730,"controllerName":"product"},"error":null,"jtlrpc":"2.0","id":"494c4facc1524bc8a0d8f6e8ee97efe2"}
(10752,3957 milliseconds)
<<< Customer.statistic: {"result":{"available":110,"controllerName":"customer"},"error":null,"jtlrpc":"2.0","id":"adc7eefc56b342148469597695b79edc"}
(1023,342 milliseconds)
JTL-Wawi: End sync
Exception: DeserializeObject-Error: Newtonsoft.Json.JsonReaderException: Unexpected character encountered while parsing value: <. Path '', line 0, position 0.
bei Newtonsoft.Json.JsonTextReader.ParseValue()
bei Newtonsoft.Json.JsonTextReader.ReadInternal()
bei Newtonsoft.Json.JsonTextReader.Read()
bei Newtonsoft.Json.Serialization.JsonSerializerInternalReader.ReadForType(JsonReader reader, JsonContract contract, Boolean hasConverter)
bei Newtonsoft.Json.Serialization.JsonSerializerInternalReader.Deserialize(JsonReader reader, Type objectType, Boolean checkAdditionalContent)
bei Newtonsoft.Json.JsonSerializer.DeserializeInternal(JsonReader reader, Type objectType)
bei Newtonsoft.Json.JsonConvert.DeserializeObject(String value, Type type, JsonSerializerSettings settings)
bei Newtonsoft.Json.JsonConvert.DeserializeObject[T](String value, JsonSerializerSettings settings)
bei jtlCore.ControllerClasses.Connector.Core.Json.DeserializeObject[T](String json)

Json:<br />
<b>Fatal error</b>: Unknown: Cannot use output buffering in output buffering display handlers in <b>Unknown</b> on line <b>0</b><br />
Exception bei CustomerOrder.statistic:

DeserializeObject-Error: Newtonsoft.Json.JsonReaderException: Unexpected character encountered while parsing value: <. Path '', line 0, position 0.
bei Newtonsoft.Json.JsonTextReader.ParseValue()
bei Newtonsoft.Json.JsonTextReader.ReadInternal()
bei Newtonsoft.Json.JsonTextReader.Read()
bei Newtonsoft.Json.Serialization.JsonSerializerInternalReader.ReadForType(JsonReader reader, JsonContract contract, Boolean hasConverter)
bei Newtonsoft.Json.Serialization.JsonSerializerInternalReader.Deserialize(JsonReader reader, Type objectType, Boolean checkAdditionalContent)
bei Newtonsoft.Json.JsonSerializer.DeserializeInternal(JsonReader reader, Type objectType)
bei Newtonsoft.Json.JsonConvert.DeserializeObject(String value, Type type, JsonSerializerSettings settings)
bei Newtonsoft.Json.JsonConvert.DeserializeObject[T](String value, JsonSerializerSettings settings)
bei jtlCore.ControllerClasses.Connector.Core.Json.DeserializeObject[T](String json)

Json:<br />
<b>Fatal error</b>: Unknown: Cannot use output buffering in output buffering display handlers in <b>Unknown</b> on line <b>0</b><br />

Response: <br />
<b>Fatal error</b>: Unknown: Cannot use output buffering in output buffering display handlers in <b>Unknown</b> on line <b>0</b><br />



Wo liegt hier das Problem!?
Über Lösungsvorschläge freue ich mich natürlich sehr