upgrading from 12.04 to 14.04

Don Parsons dfp10 at verizon.net
Sat Nov 8 18:46:26 UTC 2014

When I click on "Upgrade" I get:

Unable to load page

Problem occurred while loading the URL 

Cannot resolve proxy hostname ()

How do I get the upgrade to work properly?
When it does, will all my present LibreOffice documents be preserved?
Don Parsons

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