When attempting to use the "All Desktop" packaging functionality, in the editor, the user is redirected to the main splash page for UE Documentation: https://docs.unrealengine.com/en-us/
I do believe the Desktop (Win+Mac+Linux) functionality is not currently supported. I will log a JIRA separately for this.
However, can we redirect the user to a page that is relational to the issue they are seeing?
This was pointed out by a community member in the Unreal Engine 4 Developers Community FB Group. See: [Link Removed]
Result:
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-57918 in the post.