"online" example does not work

Following the [tutorial |https://doc.qt.io/qtinstallerframework/qtinstallerframework-online-example.html]  I get this error:

..\..\bin\repogen --update-new-components -p packages_update repository
Caught exception: Cannot update "2022-02-28-1804_meta.7z" with --update-new-components. Use --update instead. Currently it is not possible to update partial components inside one 7z.

In fact I came across the same error when generating my product repo. Then I checked the example and it didn't work either.  I don't know why no one has reported this. 

Update: I checked QTIFW 3.2.2, the example can work.