Some Outlook.com folders not loading with email, but email is in the Outlook Web app.

I’m just testing the free version before I buy, but…

Some of my Outlook.com email folders should have an Inbox (as in Outlook.com, connected email addresses) but the Inbox is not displayed.  The folder shown is not loading with email.

What am I overlooking?
The setup was automatic, one Microsoft account.  These folders and contents are shown in other email clients…

No reply?
Wow is this a bug?