List of packages is empty even after successful compilation of the package

[Bernd Porr]

I've just created a first package for xenial here:
https://launchpad.net/~berndporr/+archive/ubuntu/usbdux
Done my:
add-apt-repository ppa:berndporr/usbdux
and then the
apt-get update
that gives the following error:
Err:10 http://ppa.launchpad.net/berndporr/usbdux/ubuntu xenial/main amd64 Packages
  404 Not Found
and
W: The repository 'http://ppa.launchpad.net/berndporr/usbdux/ubuntu xenial Release' does not have a Release file.
N: Data from such a repository can't be authenticated and is therefore potentially dangerous to use.
N: See apt-secure(8) manpage for repository creation and user configuration details.
E: Failed to fetch http://ppa.launchpad.net/berndporr/usbdux/ubuntu/dists/xenial/main/binary-amd64/Packages 404 Not Found
E: Some index files failed to download. They have been ignored, or old ones used instead.
Any ideas how to fix it?

[William Grant (wgrant)]

Packages are only available on ppa.launchpad.net once their status on the PPA page changes from "Pending" to "Published".