User gets a 404 error message when creating subpages under pages named “resources”. Also occurs on the demo when created under “travel” or “sportstation”. But does not occur with other names nor when you duplicate “travel” or “sportstation”. See below examples with different page structures and the recorded results:

test1
->resources
    ->subpage_test
Page is displayed correctly

(within the demo)
travel
->resources
    ->subpage_test
Results in 404 page

(within the demo)
sportstation
-> resources
    ->subpage_test
Results in 404 page

(within the demo)
sportstation0 (duplicated page)
-> resources
    ->subpage_test
Page is displayed correctly

resources
->subpage_test
Results in 404 page

test1
->subpage_test1
    ->resources
        ->subpage_test2
Page is displayed correctly

Error is reproduced in 5.7.6 as well as 6.2 from fresh instances and within the demo. Workaround would be to use a different name other than "resources". Tried using other keywords but did not see any difference.