my App Store is broken for Mac High Sierra 10.13.5 I will click featured or something else and it automatically redirects me to updates. 

What sequence of things can I try to unstick this or reset the application so I can browse the features and other sections of the Mac App Store?
You can solve this problem by omitting the AppStore and installing all system updates through the terminal.

Open Terminal and type:


List all available updates:


sudo softwareupdate -l


Install all available updates:


sudo softwareupdate -i -a

This update fixes the app and returns proper function.