iis express command line

I am trying to run:

cd\
cd "C:\Program Files (x86)\IIS Express"
iisexpress.exe /config:"C:\Users\jimwin7a\source\repos\pcore31\.vs\pcore31\config\applicationhost.config" /site:"pcore31" /apppool:"pcore31 AppPool"

iis express load, but instead of the site loading all I get is:

HTTP Error 500.0 - ANCM In-Process Handler Load Failure

Tried with and without /apppool:"pcore31 AppPool"

And it runs fine from within VS 2019 Community.

Can someone help me figure out how to load a site from command line without error?