Scenario:
create a page under another one, set this page as container and try to save it without alias. Alias field shows error asking for unique alias. This is happening when friendly url is on (use_alias_urls = Yes).
Is it supposed to be like that? Sometimes is page set as container unintentionally (e.g. because of having subpages in past) and it is then impossible to save it without alias. I know, if friendly url is On there should be alias. But in my case I am using this resource as content holder in different context not accessible directly from web. Page Settings Tab and all fields are hidden and I could not find why it is not saving as error field (alias) was hidden as well.
NOTE - there is only Success message after resource Save action - would be good to show Error message as well along with current highlighting of error fields. If those fields are hidden using Form Customization you are not getting any error message.
Have a nice day,
Vlad