System.ArgumentNullException running new Function project from Visual Studio

Created fresh Azure Functions project from VS 2019 with storage in Azure. Trying to start it gives the following error: `System.ArgumentNullException: 'Value cannot be null.
Parameter name: path'` at
```
System.IO.FileSystem.dll!System.IO.File.ReadAllText(string path) Unknown
System.IO.Abstractions.dll!System.IO.Abstractions.FileWrapper.ReadAllText(string path) Unknown
func.dll!Azure.Functions.Cli.Common.FileSystemHelpers.ReadAllTextFromFile(string path) Line 33 C#
func.dll!Azure.Functions.Cli.Common.AppSettingsFile.AppSettingsFile(string filePath) Line 18 C#
[Lightweight Function]
Newtonsoft.Json.dll!Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateObjectUsingCreatorWithParameters(Newtonsoft.Json.JsonReader reader, Newtonsoft.Json.Serialization.JsonObjectContract contract, Newtonsoft.Json.Serialization.JsonProperty containerProperty, Newtonsoft.Json.Serialization.ObjectConstructor creator, string id) Unknown
Newtonsoft.Json.dll!Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateNewObject(Newtonsoft.Json.JsonReader reader, Newtonsoft.Json.Serialization.JsonObjectContract objectContract, Newtonsoft.Json.Serialization.JsonProperty containerMember, Newtonsoft.Json.Serialization.JsonProperty containerProperty, string id, out bool createdFromNonDefaultCreator) Unknown
Newtonsoft.Json.dll!Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateObject(Newtonsoft.Json.JsonReader reader, System.Type objectType, Newtonsoft.Json.Serialization.JsonContract contract, Newtonsoft.Json.Serialization.JsonProperty member, Newtonsoft.Json.Serialization.JsonContainerContract containerContract, Newtonsoft.Json.Serialization.JsonProperty containerMember, object existingValue) Unknown
Newtonsoft.Json.dll!Newtonsoft.Json.Serialization.JsonSerializerInternalReader.CreateValueInternal(Newtonsoft.Json.JsonReader reader, System.Type objectType, Newtonsoft.Json.Serialization.JsonContract contract, Newtonsoft.Json.Serialization.JsonProperty member, Newtonsoft.Json.Serialization.JsonContainerContract containerContract, Newtonsoft.Json.Serialization.JsonProperty containerMember, object existingValue) Unknown
Newtonsoft.Json.dll!Newtonsoft.Json.Serialization.JsonSerializerInternalReader.Deserialize(Newtonsoft.Json.JsonReader reader, System.Type objectType, bool checkAdditionalContent) Unknown
Newtonsoft.Json.dll!Newtonsoft.Json.JsonSerializer.DeserializeInternal(Newtonsoft.Json.JsonReader reader, System.Type objectType) Unknown
Newtonsoft.Json.dll!Newtonsoft.Json.JsonConvert.DeserializeObject(string value, System.Type type, Newtonsoft.Json.JsonSerializerSettings settings) Unknown
Newtonsoft.Json.dll!Newtonsoft.Json.JsonConvert.DeserializeObject(string value, Newtonsoft.Json.JsonSerializerSettings settings) Unknown
func.dll!Azure.Functions.Cli.Common.AppSettingsFile.AppSettingsFile(string filePath) Line 18 C#
func.dll!Azure.Functions.Cli.Common.SecretsManager.GetSecrets() Line 42 C#
func.dll!Azure.Functions.Cli.Helpers.WorkerRuntimeLanguageHelper.GetCurrentWorkerRuntimeLanguage(Azure.Functions.Cli.Interfaces.ISecretsManager secretsManager) Line 134 C#
func.dll!Azure.Functions.Cli.Helpers.GlobalCoreToolsSettings.Init(Azure.Functions.Cli.Interfaces.ISecretsManager secretsManager, string[] args) Line 48 C#
func.dll!Azure.Functions.Cli.ConsoleApp.ConsoleApp(string[] args, System.Reflection.Assembly assembly, Autofac.IContainer container) Line 173 C#
func.dll!Azure.Functions.Cli.ConsoleApp.RunAsync(string[] args, Autofac.IContainer container) Line 38 C#
func.dll!Azure.Functions.Cli.ConsoleApp.Run.AnonymousMethod__0() Line 32 C#
System.Private.CoreLib.dll!System.Threading.Tasks.Task.InnerInvoke() Unknown
System.Private.CoreLib.dll!System.Threading.Tasks.Task..cctor.AnonymousMethod__278_1(object obj) Unknown
System.Private.CoreLib.dll!System.Threading.ExecutionContext.RunInternal(System.Threading.ExecutionContext executionContext, System.Threading.ContextCallback callback, object state) Unknown
System.Private.CoreLib.dll!System.Threading.Tasks.Task.ExecuteWithThreadLocal(ref System.Threading.Tasks.Task currentTaskSlot) Unknown
System.Private.CoreLib.dll!System.Threading.Tasks.Task.ExecuteEntryUnsafe() Unknown
System.Private.CoreLib.dll!System.Threading.Tasks.Task.System.Threading.IThreadPoolWorkItem.ExecuteWorkItem() Unknown
System.Private.CoreLib.dll!System.Threading.ThreadPoolWorkQueue.Dispatch() Unknown
System.Private.CoreLib.dll!System.Threading._ThreadPoolWaitCallback.PerformWaitCallback() Unknown
```

Checking the source code I see that problem is as following:
- `AppSettingsFile` constructor tries to deserialize another instance of `AppSettingsFile` via Json.NET.
- Since it doesn't have any other constuctors, one with `string filePath` is used with `null` as parameter value.
- `null` passed gives error above during recursive deserialization attempt.

It seems that adding empty private constructor to `AppSettingsFile` should solve this, or there's something wrong with my installation.

**CLI v2.24.0**
**VS 2019 v16.2.0 Preview 3.0**