The Palo Alto firewall uses bright cloud service for it’s URL categorisation. If a URL is incorrectly categorised you can submit a category change request at the URL below:
When submitting a change request select “I would like to receive notifications regarding this change” to receive notifications on the request, I personally alway select this so I receive a notification of what they’ve changed the category too (they don’t always use the category you selected)
In the notification you’ll recieve will be a database version number, this relates to the version number in the PaloAlto web interface.
If the database version is correct and the the URL is still being incorrectly categorized, run the following from the CLI:
user@hostname> clear url-cache
This will clear the URL cache on the device so on the next visit to the website it re-evaluates against the new database.