You’re happy that you have just updated your Windows 10© to the latest version (Version 1803 at the moment of writing this post), but when trying to get an app from the store that you have never installed or purchesed before, the app page just refreshes and nothing happens.
This only affects apps that show the Get button:
And not the Install button:
Here’s how to fix this: Click your account picture located in the top right of the Microsoft Store© window, next to the Search Bar.