Symptoms

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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

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ALL

Environment

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Seen in the service portal.

Cause 

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

Resolution

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