Warning: Trying to access array offset on value of type bool in /customers/5/3/b/mnordlund.se/httpd.www/wp-includes/theme.php on line 2241

Fatal error: Uncaught Error: Call to undefined function create_function() in /customers/5/3/b/mnordlund.se/httpd.www/wp-content/plugins/rss-icon-widget/rss-icon-widget.php:147
Stack trace:
#0 /customers/5/3/b/mnordlund.se/httpd.www/wp-settings.php(305): include_once()
#1 /customers/5/3/b/mnordlund.se/httpd.www/wp-config.php(90): require_once('/customers/5/3/...')
#2 /customers/5/3/b/mnordlund.se/httpd.www/wp-load.php(37): require_once('/customers/5/3/...')
#3 /customers/5/3/b/mnordlund.se/httpd.www/wp-blog-header.php(13): require_once('/customers/5/3/...')
#4 /customers/5/3/b/mnordlund.se/httpd.www/index.php(17): require('/customers/5/3/...')
#5 {main}
  thrown in /customers/5/3/b/mnordlund.se/httpd.www/wp-content/plugins/rss-icon-widget/rss-icon-widget.php on line 147