CircaLucid

I had the same error. Ended up just having to update wp-settings.php.

I found the solution here:
https://www.ads-software.com/support/topic/upgrade-to-34-from-311-fatal-error

I had a similar issue where I was getting “Uncaught ReferenceError: switchEditors is not defined”. I was writing my own plugin and I ended up using this in WP 3.3.1:

$url=site_url(‘wp-admin/js/editor.js’);
wp_register_script(‘editor_js’,$url);
wp_enqueue_script(‘editor_js’);
wp_editor(”, ‘c2c-opps-editor’, $settings);

I installed WordPress on my Ubuntu 11.10 server, so this may or may not apply. If you:
tail /var/log/apache2/error.log
and get:
sh: /usr/sbin/sendmail: not found

Then:

# https://samiux.wordpress.com/2009/07/31/howto-godaddy-coms-relay-mail-server-with-postfix-on-ubuntu-server/
sudo apt-get remove sendmail
sudo apt-get autoremove
sudo apt-get install postfix
sudo nano /etc/postfix/sasl/sasl_passwd
smtpout.secureserver.net [email protected]:XXXXXXXXXXXXXXXXX

chown root:root /etc/postfix/sasl/sasl_passwd
chmod 600 /etc/postfix/sasl/sasl_passwd
postmap /etc/postfix/sasl/sasl_passwd
sudo nano /etc/postfix/main.cf
relayhost = [smtpout.secureserver.net]
smtp_sasl_auth_enable = yes
smtp_sasl_password_maps = hash:/etc/postfix/sasl/sasl_passwd
smtp_sasl_security_options = noanonymous