Sitecore 9 安装 - error - Config Error: This configuration section cannot be used at this path. This happens when the section is locked at a parent level. Locking is either by default (overrideModeDefau

Error:

Config Error: This configuration section cannot be used at this path. This happens when the section is locked at a parent level. Locking is either by default (overrideModeDefault="Deny"), or set explicitly by a location tag with overrideMode="Deny" or the legacy allowOverride="false".

Cause: 没有安装IIS Application Development

Solution: 安装IIS Application Development(参见https://stackoverflow.com/questions/9794985/config-error-this-configuration-section-cannot-be-used-at-this-path）