Symptoms

When clicking on the knowledge category breadcrumb you are redirected to a blank kb_category page within the portal.

The plain text breadcrumb for the article title is missing. 

Release

ALL

Environment

Seen in the service portal.

Cause 

Since the Knowledge article does not have a category associated with it we cannot correctly build out the breadcrumbs.

Resolution

Set the category field (kb_category) for the Article to resolve the issue.