Version 4.401 - HTTP Error 500.30 - ASP.NET Core app failed to start

You definitely installed via the bundle, not individually? If you didn't install via the bundle, you won't have the ASP.NET Core Module v2 installed.

yes , Installed via the bundle only
appreciate the help .
Should I install  ASP.NET Core Module v2 as well ?
thx Ran

One more thing, what version are you using - x86 or x64 (source, or no source)?

And IIS is running 64 bit, not 32?

Oh, and the .net CLR version, are you using No Managed Code for the application pool?

I think so , IIS 10 , default installation

I think so , IIS 10 , default installation

Here's how to check: https://www.vntweb.co.uk/is-iis-running-64-bit-or-32-bit/

Or, Go to Server Manager > Tools > IIS Manager > hostname > Application Pools > Right click on application_pool_name > Advanced properties;
If the option "Enable 32 bit applications" is set to true, it runs on 32 bit mode;
If the option "Enable 32 bit applications" is set to false, it runs in 64-bit mode.