http://kb.yoast.com/article/58-xml-sitemap-error
– try disabling other plugins to see if some of them are making whitespaces
I’ve also just updated (same versions as OP, and get this warning, when debug is on:
The called constructor method for WP_Widget is <strong>deprecated</strong> since version 4.3! Use __construct() instead.
Found a solution yet? I have the same problem on several sites
Thread Starter
majbom
(@majbom)
Found out that php5-json not is installed by default on ubuntu 13.10
sudo apt-get install php5-json
made the site work perfectly!