Unable to start process C:\Program Files\dotnet\dotnet.exe. The web server request failed with status code 502. Error in Visual Studio 2017

Question

I am facing a strange issue while building a solution which has web projects. I get the error below. Any solution or thought on it.

Answer 1

Fixed by adding forwardWindowsAuthToken="false" in the web.config file.

 <aspNetCore processPath="%LAUNCHER_PATH%" arguments="%LAUNCHER_ARGS%" forwardWindowsAuthToken="false" stdoutLogEnabled="false" />

https://learn.microsoft.com/en-us/aspnet/core/host-and-deploy/aspnet-core-module

Answer 2

I faced the same issue here

How I fix

(1) Open Event Log. I noticed that there is a warning: 'Static compression is being disabled'.

(2) Follow the 2 links to fix this issue

• https://forums.iis.net/t/1195656.aspx?The+directory+specified+for+caching+compressed+content+is+invalid+Static+compression+is+being+disabled+

• https://learn.microsoft.com/en-us/previous-versions/windows/it-pro/windows-server-2008-R2-and-2008/cc735199(v=ws.10)

(3) Open TOOLS -> Options -> Projects and Solutions

Enable 'Use the 64 bit version of IIS Express for web sites and projects' (My system is 64 bit)

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I am not very sure what happen exactly. But this helps me to fix this issue. Hope it can help you as well.