Some people are reporting an issue where they've followed a link to Sketchbook Pro on the Microsoft Store and see a page that says "Not available for bots to index" instead of the Sketchbook Pro page.

This issue affects apps across the Store - not only Sketchbook Pro - though it may not affect all users in all regions.

The problem has been reported to Microsoft as of August 21 and will hopefully be resolved soon. 

In the meantime, if you're running into this problem you should be able to get to an app page by going to the Microsoft Store homepage and searching for an app from the Search box in the upper left.