title: How to update plugin when I can't sign in?
body: <p>I am getting this message when trying to login</p>
  
  <pre><code>Warning: Declaration of Axiom_Plugin_Updater::download_package($package) should be compatible with WP_Upgrader::download_package($package, $check_signatures = false) in /var/www/fantasine.dk/public_html/wp-content/plugins/masterslider/admin/includes/classes/class-axiom-plugin-updater.php on line 29
  
  Warning: Cannot modify header information - headers already sent by (output started at /var/www/fantasine.dk/public_html/wp-content/plugins/masterslider/admin/includes/classes/class-axiom-plugin-updater.php:29) in /var/www/fantasine.dk/public_html/wp-includes/pluggable.php on line 1251
  
  Warning: Cannot modify header information - headers already sent by (output started at /var/www/fantasine.dk/public_html/wp-content/plugins/masterslider/admin/includes/classes/class-axiom-plugin-updater.php:29) in /var/www/fantasine.dk/public_html/wp-includes/pluggable.php on line 1254
  </code></pre>
  
  <p>Is there any way I can fix this when I can't log in to the dashboard?</p>
  
  <p>I am thinking maybe it would be possible through ftp login? If so, how do I go about it?
  Also, is there a way to take a back up of the site when I can't log in to dashboard?</p>
  
  <p>Thanks for any help</p>