[Solved] Asp.Net Core IIS Error: HTTP Error 500.30 – ASP.NET Core app failed to start

The error message prompts you to check whether there is an error message in the system event log


check the event log and find

according to ASP Net core module – Microsoft docs shows that the default configuration is in-process hosting, which is set to inprocess. It shows that the specified web project is out of process hosting

Solution:
only the published web Change hostingmodel = “inprocess” in config file to hostingmodel = “outofprocess” or delete hostingmodel = “inprocess” directly.

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