we are created new development environment so I cloned a current working app service into a new one and changed the configurations and deployed same code but the new app service is returning HTTP Error 500.30 - ANCM In-Process Start Failure
after trying the console for more details that's what I get, I don't think its related to runtime identifier because same code runs on different exact app services 
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Miroo
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It seems you are lacking of the required library named `hostpolicy.dll` . How do you clone your app? – Doris Lv Feb 24 '21 at 02:59
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through clone app feature in azure – Miroo Feb 24 '21 at 12:36
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Have a look at this: https://stackoverflow.com/questions/42396782/error-loading-hostpolicy-dll-while-deploying-net-core-console-app-to-azure-webj – Doris Lv Feb 26 '21 at 07:35
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And you could trouble shooting like this: https://stackoverflow.com/questions/63053677/azure-unhandled-exception-system-io-filenotfoundexception/63065704#63065704 – Doris Lv Feb 26 '21 at 07:42
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The dreaded 500.3x ACNM error can mean different things, so I'm going to assist you in pinpointing those things.
My recommendation: Go to Azure Portal > Your App Service > development tools
Open console.
Screen should look like this: Console Screen Azure
Type in (YourWebAppName).exe
What this will do, is show error messages that are relevant to your startup issue.
Also, some information regarding errors can be seen here: https://learn.microsoft.com/en-us/aspnet/core/test/troubleshoot-azure-iis?view=aspnetcore-3.1#app-startup-errors
