The portal's Knowledge page "/kb_view2" will return an empty page if no knowledge base is associated with the Service Portal.
Additionally, when you search for articles none will be available.
In order to associate a knowledge base to a service portal :
- Navigate to Service Portal > Portals.
- Click on the Portal record.
- Locate the Knowledge base field.
- Populate it with an active knowledge base.
You can attach only one Knowledge Base per portal.
In order to associate multiple knowledge bases on a single portal, you may use "Knowledge Management - Service Portal" [com.snc.knowledge_serviceportal] which has this functionality.