osTicket installation failed - code base discontinued...

Downloading http://www.osticket.com/download.php?file=osticket_1.3.1.zip ..
Received 22 bytes
.. download complete.

Now installing osTicket version 1.3.1 ..

Failed to extract source : Archive:
/tmp/.webmin/osticket_1.3.1.zip End-of-central-directory signature not
found. Either this file is not a zipfile, or it constitutes one disk
of a multi-part archive. In the latter case the central directory and
zipfile comment will be found on the last disk(s) of this archive.
unzip: cannot find zipfile directory in one of
/tmp/.webmin/osticket_1.3.1.zip or
/tmp/.webmin/osticket_1.3.1.zip.zip, and cannot find
/tmp/.webmin/osticket_1.3.1.zip.ZIP, period. .

.. failed! See the error message above for the reason why.

And...

FROM> http://www.osticket.com/downloads.php

Download the latest release and patches.
2.0 Beta coming soon!
osTicket code base is changing!
Version 2.0 is a complete re-write.
1.X.X Discontinued No downloads
The 1.X.X code base discontinued.

Status: 
Closed (fixed)