I upgraded to 4.7.14 and now I get the following error when running /wp-content/plugins/civicrm/civicrm/bin/cron.php.  I'm running Wordpress 4.7.

> Fatal error:  Uncaught exception 'Exception' with message 'Function "is_admin()" is missing, even though WordPress is the user framework.' in /home/mysite/www/www/wp-content/plugins/civicrm/civicrm/CRM/Utils/System/Base.php:261
Stack trace: etc

This is similar to the post [Cron error after upgrade to 4.7.1](http://civicrm.stackexchange.com/questions/9353/cron-error-after-upgrade-to-4-7-1).

cron has been running fine for years previously - on the same host

I'm trying to run:

    GET 'http://mysite.com.au/wp-content/plugins/civicrm/civicrm/bin/cron.php?name=admin&pass=somepassword&key=sitekey'

I can run the jobs manually from the scheduled jobs screen and they complete

I've tried:

1. cli and URL versions
2. changing permissions for cron.php and cli.php
3. confirmed no special characters in password or site key

That's about the extent of my capabilities sadly.. Any suggestions please?