You can use this attached xml to load and commit the missing knowledge base into your lab instance.
Procedure:
- Navigate to System Update Sets > Local Update Sets.
- Right-click on the Name column, and click Import XML menu.
- On the Import XML form, click Choose file button, and select the update set XML file.
- Click Upload button.
You then need to Preview and Commit the update set that is now 'Loaded'.
Once the update set has been committed, you should then be able to browse to the Knowledge Base and the Article with the zip file attached