I have WP version 3.04 running on my domain (www.keyelement.pt) and everything was working fine till today.
Since I needed to add multi language features, I've searched the best rated plugins for this and opted to install 'QTranslate'.
After the instalation, I activated the plugin and then EVERYTHING stopped working and I get the following Error Message:
Fatal error: Call to undefined method stdClass::set_prefix() in /home/keyetpt1/public_html/wp-includes/load.php on line 337
I cant even access WP's Backoffice (http://www.keyelement.pt/wp-login.php). The error message is the same! :(
Please, any help is very welcome.
Thanks in advance.