asp.net core mvc HTTP Error 502.5 HTTP Error 502.5 - Process Failure Common causes of this issue: The application process failed to start The application process started but then stopped The application process started but failed to listen on the configured port Troubleshooting steps: Check the system event log for error messages Enable logging the application process' stdout messages Attach a debugger to the application process and inspect For more information visit: https://go.microsoft.com/fwlink/?LinkID=808681 解决方法: web.config 中 删除 " -argFile IISExeLauncherArgs.txt" 即可。 <aspNetCore processPath="dotnet" arguments=".demo.dll -argFile IISExeLauncherArgs.txt" forwardWindowsAuthToken="false" stdoutLogEnabled="false" stdoutLogFile=".logsstdout" />