GSON error when calling insertOrUpdate or insertOrUpdateBulk

[javadeveloper080]

GSON error when calling

ErrorMessage:com.google.gson.JsonSyntaxException: java.lang.IllegalStateException: Expected BEGIN_ARRAY but was STRING at line 1 column 13 path $.results
	at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.read(ReflectiveTypeAdapterFactory.java:225)

Response for insertOrUpdate

{
    "results": {
        "message": "Suppression list successfully updated"
    }
}
**Response for insertOrUpdateBulk**

{ "results":

}