You probably need to install some prerequisite features for this Role
Under Initial Configuration Tasks, click “Add Roles” under Customize this Server screen
Click Next button after the Add Roles Wizard starts
Select the checkbox for Web Server (IIS)
Click Next button
It says Add features required for Web Server (IIS), which include Windows Process Activation Service, and subfeatures for Process Model, and Configuration
API's.
Click the button for Add Required Features
Click Next Button in the Add Roles Wizard
Click Next Button under Intro to Web Server (IIS)
All the ROLE SERVICES will be shown, including - Static Content, Default Document, Directory Browsing, Http Errors, Http login, Request Monitor, Request Filtering, Static Content Compression, IIS Management Console
Click Next Button
Under Confirmation screen, review and click Install button
Click “Close” Button when progress indicator finishes and the Wizard concludes stating that “Installation Succeeded”
It is recommended to restart the Windows Server even if you are not prompted to do so.