Hosting Asp.Net Core 3.0 in Azure: HTTP Error 500.31 - ANCM Failed to Find Native Dependencies

Question

I am trying to host an ASP.NET Core 3.0 API in Azure:

<Project Sdk="Microsoft.NET.Sdk.Web">

  <PropertyGroup>
    <TargetFramework>netcoreapp3.0</TargetFramework>
  </PropertyGroup>

  <PropertyGroup>
    <IsPackable>false</IsPackable>
    <NeutralLanguage>en-US</NeutralLanguage>
    <LangVersion>latest</LangVersion>   
  </PropertyGroup>  

  <ItemGroup>
    <PackageReference Include="Microsoft.AspNetCore.Mvc.Versioning" Version="3.*" />
    <PackageReference Include="Microsoft.AspNetCore.Diagnostics.EntityFrameworkCore" Version="3.*" />
    <PackageReference Include="Microsoft.AspNetCore.Identity.EntityFrameworkCore" Version="3.*" />
    <PackageReference Include="Microsoft.Extensions.Diagnostics.HealthChecks.EntityFrameworkCore" Version="3.*" />
  </ItemGroup>       

</Project>

But when I run de application I get:

HTTP Error 500.31 - ANCM Failed to Find Native Dependencies

Common solutions to this issue:
The specified version of Microsoft.NetCore.App or Microsoft.AspNetCore.App was not found.
Specific error detected by ANCM:
It was not possible to find any compatible framework version The specified framework 'Microsoft.AspNetCore.App', version '3.0.0' was not found. - The following frameworks were found: 2.1.12 at [D:\Program Files (x86)\dotnet\shared\Microsoft.AspNetCore.App] 2.1.13 at [D:\Program Files (x86)\dotnet\shared\Microsoft.AspNetCore.App] 2.2.6 at [D:\Program Files (x86)\dotnet\shared\Microsoft.AspNetCore.App] 2.2.7 at [D:\Program Files (x86)\dotnet\shared\Microsoft.AspNetCore.App] You can resolve the problem by installing the specified framework and/or SDK. The .NET Core frameworks can be found at: - https://aka.ms/dotnet-download

What am I missing?

Answer 1

The current picture is that ASP.NET Core 3.0 is available everywhere (but not the SDK).

Despite this fact, I (seemingly randomly) got a

HTTP Error 500.31 - ANCM Failed to Find Native Dependencies

until I realized that activating logging in web.config by setting stdoutLogEnabled to true without adjusting the stdoutLogFile to \\?\%home%\LogFiles\stdout (as suggested in Troubleshoot ASP.NET Core on Azure App Service and IIS) was the cause of this error message.

Took me some hours to realize this causality.

Answer 2

ASP.NET Core 3.0 not currently available for Azure App Service. [Microsoft Docs]

The preview versions of .NET Core 3.0 [Microsoft Docs] are available on the Azure service.