Why can't I open my Azure Bot service in Visual Studio?

Question

Why can't I open my Azure Bot service in Visual Studio?

Okay, so this problem is rather complicated, but I will try to make it as simple as possible.

So, I have this bot service created on the Microsoft Azure platform. It is connected to BitBucket with continuous integration. Then I tried to follow the instructions here to be able to debug the bot locally using Visual Studio. I downloaded and installed all the necessary tools and pulled the BitBucket project into the local repository. However, when I tried to run "dotnet restore" in the message folder, I received this error message:

C: \ ... \ messages \ project.json (1,1): error MSB4025: project file could not be loaded. Data at the root level is invalid. Line 1, position 1.

This project.json file was automatically created by Azure; why should this be invalid? The content is as follows:

{
  "frameworks": {
    "net46":{
      "dependencies": {
      "Microsoft.Bot.Builder.Azure": "3.1"
      }
    }
   }
}

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I also tried the same with Visual Studio 2017, this time including the messages.csproj file in the message folder. And this time, recovery in dotnet says that I need to specify the project / solution file, because there are several in the folder. I do not know if this is necessarily a problem, but it is not mentioned at all in the official guide, so this is at least a little suspicious. In any case, specifying project.json produces the same error, indicating that message.csproj seems to work correctly and outputs this:

  NuGet Config files used:
      C:\Users\Connor.Johnson\AppData\Roaming\NuGet\NuGet.Config
      C:\Program Files (x86)\NuGet\Config\Microsoft.VisualStudio.Offline.config

  Feeds used:
      https://api.nuget.org/v3/index.json
      C:\Program Files (x86)\Microsoft SDKs\NuGetPackages\

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debughost.cmd. project.lock.json zip , Azure ( gitignore), debughost . . , debughost.cmd .

Naw, , Visual Studio. ., bot.sln, :