Fatal error: Uncaught Error: Call to undefined function CommentReplyEmailNotification\wp_get_wp_version() in /customers/9/f/4/schreiben-fuer-die-katz.ch/httpd.www/wp-content/plugins/comment-reply-email-notification/classes/CommentReplyEmailNotification.php:22
Stack trace:
#0 /customers/9/f/4/schreiben-fuer-die-katz.ch/httpd.www/wp-content/plugins/comment-reply-email-notification/cren_plugin.php(21): CommentReplyEmailNotification\CommentReplyEmailNotification->__construct()
#1 /customers/9/f/4/schreiben-fuer-die-katz.ch/httpd.www/wp-settings.php(473): include_once('/customers/9/f/...')
#2 /customers/9/f/4/schreiben-fuer-die-katz.ch/httpd.www/wp-config.php(96): require_once('/customers/9/f/...')
#3 /customers/9/f/4/schreiben-fuer-die-katz.ch/httpd.www/wp-load.php(50): require_once('/customers/9/f/...')
#4 /customers/9/f/4/schreiben-fuer-die-katz.ch/httpd.www/wp-blog-header.php(13): require_once('/customers/9/f/...')
#5 /customers/9/f/4/schreiben-fuer-die-katz.ch/httpd.www/index.php(17): require('/customers/9/f/...')
#6 {main}
  thrown in /customers/9/f/4/schreiben-fuer-die-katz.ch/httpd.www/wp-content/plugins/comment-reply-email-notification/classes/CommentReplyEmailNotification.php on line 22