Unexpected initial token 'String' when populating object

I get the following error when trying to generate .net core code from swagger specifications .yml

Newtonsoft.Json.JsonSerializationException: Unexpected initial token ‘String’ when populating object. Expected JSON object or array. Path ‘paths[’/api/acceptatie/scenario/foobar/v1’].__referencePath’, line 1, position 592.

Runtime: NetCore21 at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.Populate(JsonReader reader, Object target) at NJsonSchema.ExtensionDataDeserializationConverter.ReadJson(JsonReader reader, Type objectType, Object existingValue, JsonSerializer serializer) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.DeserializeConvertable(JsonConverter converter, JsonReader reader, Type objectType, Object existingValue) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.Deserialize(JsonReader reader, Type objectType, Boolean checkAdditionalContent) at NSwag.SwaggerPathItem.SwaggerPathItemConverter.ReadJson(JsonReader reader, Type objectType, Object existingValue, JsonSerializer serializer) in C:\projects\nswag\src\NSwag.Core\SwaggerPathItem.cs:line 89 at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.DeserializeConvertable(JsonConverter converter, JsonReader reader, Type objectType, Object existingValue) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.PopulateDictionary(IDictionary dictionary, JsonReader reader, JsonDictionaryContract contract, JsonProperty containerProperty, String id) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateObject(JsonReader reader, Type objectType, JsonContract contract, JsonProperty member, JsonContainerContract containerContract, JsonProperty containerMember, Object existingValue) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.SetPropertyValue(JsonProperty property, JsonConverter propertyConverter, JsonContainerContract containerContract, JsonProperty containerProperty, JsonReader reader, Object target) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.PopulateObject(Object newObject, JsonReader reader, JsonObjectContract contract, JsonProperty member, String id) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.Populate(JsonReader reader, Object target) at NJsonSchema.ExtensionDataDeserializationConverter.ReadJson(JsonReader reader, Type objectType, Object existingValue, JsonSerializer serializer) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.DeserializeConvertable(JsonConverter converter, JsonReader reader, Type objectType, Object existingValue) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.Deserialize(JsonReader reader, Type objectType, Boolean checkAdditionalContent) at Newtonsoft.Json.JsonSerializer.DeserializeInternal(JsonReader reader, Type objectType) at Newtonsoft.Json.JsonConvert.DeserializeObject(String value, Type type, JsonSerializerSettings settings) at Newtonsoft.Json.JsonConvert.DeserializeObject[T](String value, JsonSerializerSettings settings) at NJsonSchema.Infrastructure.JsonSchemaSerialization.FromJsonAsync[T](String json, SchemaType schemaType, String documentPath, Func2 referenceResolverFactory, IContractResolver contractResolver) at NSwag.SwaggerDocument.FromJsonAsync(String data, String documentPath, SchemaType expectedSchemaType, Func2 referenceResolverFactory) in C:\projects\nswag\src\NSwag.Core\SwaggerDocument.cs:line 187 at NSwag.SwaggerYamlDocument.FromYamlAsync(String data, String documentPath, SchemaType expectedSchemaType, Func`2 referenceResolverFactory) in C:\projects\nswag\src\NSwag.Core.Yaml\SwaggerYamlDocument.cs:line 70 at NSwag.Commands.OutputCommandBase.ReadSwaggerDocumentAsync(String input) in C:\projects\nswag\src\NSwag.Commands\Commands\OutputCommandBase.cs:line 52 at NSwag.Commands.SwaggerGeneration.FromSwaggerCommand.RunAsync() in C:\projects\nswag\src\NSwag.Commands\Commands\SwaggerGeneration\FromSwaggerCommand.cs:line 62 at NSwag.Commands.SwaggerGeneration.FromSwaggerCommand.RunAsync(CommandLineProcessor processor, IConsoleHost host) in C:\projects\nswag\src\NSwag.Commands\Commands\SwaggerGeneration\FromSwaggerCommand.cs:line 53 at NSwag.Commands.NSwagDocumentBase.GenerateSwaggerDocumentAsync() in C:\projects\nswag\src\NSwag.Commands\NSwagDocumentBase.cs:line 268 at NSwag.Commands.NSwagDocument.ExecuteAsync() in C:\projects\nswag\src\NSwag.Commands\NSwagDocument.cs:line 81 at NSwag.Commands.Document.ExecuteDocumentCommand.ExecuteDocumentAsync(IConsoleHost host, String filePath) in C:\projects\nswag\src\NSwag.Commands\Commands\Document\ExecuteDocumentCommand.cs:line 77 at NSwag.Commands.Document.ExecuteDocumentCommand.RunAsync(CommandLineProcessor processor, IConsoleHost host) in C:\projects\nswag\src\NSwag.Commands\Commands\Document\ExecuteDocumentCommand.cs:line 31 at NConsole.CommandLineProcessor.ProcessSingleAsync(String[] args, Object input) at NConsole.CommandLineProcessor.ProcessAsync(String[] args, Object input) at NConsole.CommandLineProcessor.Process(String[] args, Object input) at NSwag.Commands.NSwagCommandProcessor.Process(String[] args) in C:\projects\nswag\src\NSwag.Commands\NSwagCommandProcessor.cs:line 54

[Zoxive]

Turns out my issued was caused by a bug with dotnet core preview 3… https://github.com/aspnet/AspNetCore/pull/8837

When i save my swagger.json file to a file first and use that it generates fine…

[alexmartinezm]

This package becomes unusable due this bug…