I have two levels in pro sites, when i manually upgrade through admin the blogs to second level, i am getting this error "Fatal error: Call to a member function flush_rules() on a non-object in /home/ddetez/public_html/wp-includes/rewrite.php on line 108". and the site becomes not accessible. But the first level manual upgradation is working fine.
Also i have another error, when registering a new blog "Fatal error: Call to undefined function gde_base_url() in /home/ddetez/public_html/wp-content/plugins/google-document-embedder/libs/lib-setup.php on line 15
Could you please advice.