ASP.NET Core 0x80004005

Question

I am new to ASP.NET core and I am trying to just get the basic ASP.NET Core Web Application to deploy to a Windows 2012 R2 server.

I can build and run the project lo

Answer 1

Turns out that this was result of needing to install some windows updates and this problem:

api-ms-win-crt-runtime-l1-1-0.dll is missing when opening Microsoft Office file

Rather than install the version discussed in the above issue I whet into Programs and Features and ran a repair on Microsoft Visual C++ 2015 Redistributable.

The way I found this error was to convert the website to a standalone executable by performing the following steps:

In project.json remove "type":"platform" from the dependencies:

"dependencies": {
"Microsoft.NETCore.App": {
  "version": "1.0.1"     
},

Then define the Windows 12 R2 runtime:

"runtimes": {
   "win81-x64": {}
},

Then in the Website folder (the folder containing the project.json file) run the following commands from the command prompt:

dotnet build -r win81-x64
dotnet publish -c release -r win81-x64

The standalone app should be created in the folder \bin\Release\netcoreapp1.1\win81-x64.

Copy this to the server and then run it, a dialog should appear with a message similar to "api-ms-win-crt-runtime-l1-1-0.dll is missing".

From there google!

After doing all this I was able to run my Website from IIS.

Answer 2

This issue is related to Windows updates - but if you are in a similar environment than I was (where you are unable to just install ALL updates), these are the 2 that fixed the issue for me:

I had the same error in question - and got nasty error message when typing 'dotnet' into CMD:

The program can't start because api-ms-win-crt-runtime-l1-1-0.dll is missing

I solved this by manually installing the following 2 updates on Windows Server 2012 R2 (and the pre-requisites and all the other updates linked - read the installation instructions carefully on the Microsoft website):

1. KB2919355
2. KB2999226

Hope this helps someone.