Warning: Constant WP_DEBUG already defined in /home/httpd/vhosts/pc-gogi.ch/httpdocs/wp-config.php on line 93

Fatal error: Uncaught Error: Call to undefined function create_function() in /home/httpd/vhosts/pc-gogi.ch/httpdocs/wp-content/plugins/LayerSlider/layerslider.php:68
Stack trace:
#0 /home/httpd/vhosts/pc-gogi.ch/httpdocs/wp-settings.php(526): include_once()
#1 /home/httpd/vhosts/pc-gogi.ch/httpdocs/wp-config.php(104): require_once('/home/httpd/vho...')
#2 /home/httpd/vhosts/pc-gogi.ch/httpdocs/wp-load.php(50): require_once('/home/httpd/vho...')
#3 /home/httpd/vhosts/pc-gogi.ch/httpdocs/wp-blog-header.php(13): require_once('/home/httpd/vho...')
#4 /home/httpd/vhosts/pc-gogi.ch/httpdocs/index.php(17): require('/home/httpd/vho...')
#5 {main}
  thrown in /home/httpd/vhosts/pc-gogi.ch/httpdocs/wp-content/plugins/LayerSlider/layerslider.php on line 68