I have twice tried to install Viper, which I used very well on another WP blog, and twice get the same error which freezes the machine:
Fatal error: Call to undefined function add_settings_error() in /home/stuarto/public_html/wp-content/plugins/vipers-video-quicktags/vipers-video-quicktags.php on line 487
I can’t seem to find a way to start a fresh ticket so this is the best I can do.