URL alias for home page not working

New To Drupal
Using Drupal 8.3.7
Working through Drupal 8 User Guide
Having created the Home content item, following p 48 have set the URL alias: /home
Following p 53, step 2 have also entered: /home

Site shows: page not found.
Is there a permission setting allowing for URL alias entries?
Appreciate anyones help.

Drupal version: 

Source: https://www.drupal.org/taxonomy/term/22/feed