Error Message: Invalid server response or WebViewer module not available for your installation

This error occurs when trying to install the own server version of the Web Viewer and it means that the server missconfig can’t request data with cURL on the specified URL.


  1. Make sure cURL for PHP is installed and the curl_exec function is enabled on the server, and the cURL version installed is the one with SSL enabled.
  2. Also check the option to enable WebPublish is checked/enabled on your Publisher account – this option is in your Master admin panel (the one you created your Publisher account in) .