ttf-mscorefonts-installer fails download

[Sean]

Ubuntu 16.04

Every day a popup pops up with the message that the ttf-mscorefonts-installer download fails and offers me a dialig if want to retry the download now.
If I choose yes it will fail again.

I read in another bug report to do this on the shell for more information:
  sudo /usr/lib/update-notifier/package-data-downloader

The following is partially translated from another language:

[sudo] Password for xyz:
ttf-mscorefonts-installer: processing...
ttf-mscorefonts-installer: downloading http://downloads.sourceforge.net/corefonts/andale32.exe
Downloading:1 http://downloads.sourceforge.net/corefonts/andale32.exe [198 kB]
198 kB in 52 s downloaded (3.749B/s).
W: Can't drop privileges for downloading as file '/var/lib/update-notifier/package-data-downloads/partial/andale32.exe' couldn't be accessed by user '_apt'. - pkgAcquire::Run
(13: No rights)
ttf-mscorefonts-installer: downloading http://downloads.sourceforge.net/corefonts/arial32.exe
Error:1 http://downloads.sourceforge.net/corefonts/arial32.exe
  404 Not Found
W: Can't drop privileges for downloading as file '/var/lib/update-notifier/package-data-downloads/partial/arial32.exe' couldn't be accessed by user '_apt'. - pkgAcquire::Run (13: no rights)
E: Error while downloading https://heanet.dl.sourceforge.net/project/corefonts/the fonts/final/arial32.exe 404 Not Found

E: Download failed

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.