Could not find phrase 'security_token_missing'

[Lynne]

Try disabling your plugins and then see if you still have this problem.
Note: To temporarily disable the plugin system, edit config.php and add this line right under <?php

PHP Code:

define('DISABLE_HOOKS', true); 


If you still get it, create a new style - Style Manager > Create New Style > put No Parent for the parent and then browse your site with this. The new style you just created is a totally default style. See if you have the same problems on your site using it.