Common causes of this issue:

• The out of process request handler, aspnetcorev2_outofprocess.dll, could not be found next to the aspnetcorev2.dll.
• Could not read configuration correctly. Check the application's associated web.config.

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

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