You can try any of the below fixes −
Go to Run > Regedit
Open “HKEY_CURRENT_USER\Software\Microsoft\VisualStudio\1X.0\WebProjects” and change Use64BitIISExpress from 0 → 1
Next is to restart Visual Studio and IISExpress.
Other solution would be to try configuring IIS service, and set appPool .Net 4.0. You can try this to fix sapnco dll issue.
Go to IIS Manager → Application Pools
Other fix would be to navigate to Project/Properties → Set platform target from “any” to “x86”.