Warning: Use of undefined constant WC_VERSION - assumed 'WC_VERSION' (this will throw an Error in a future version of PHP) in /home/httpd/vhosts/cascana.ch/httpdocs/wp-content/plugins/wc-featured-products/includes/class-wc-featured-products-core.php on line 29

Fatal error: Uncaught Error: Class 'WC_Payment_Gateway' not found in /home/httpd/vhosts/cascana.ch/httpdocs/wp-content/plugins/woo-payrexx-gateway/src/Model/PaymentMethod/Abstract/Base.php:7
Stack trace:
#0 /home/httpd/vhosts/cascana.ch/httpdocs/wp-content/plugins/woo-payrexx-gateway/woo-payrexx-gateway.php(183): require_once()
#1 /home/httpd/vhosts/cascana.ch/httpdocs/wp-includes/class-wp-hook.php(341): WC_Payrexx_Gateway->loaded('')
#2 /home/httpd/vhosts/cascana.ch/httpdocs/wp-includes/class-wp-hook.php(365): WP_Hook->apply_filters(NULL, Array)
#3 /home/httpd/vhosts/cascana.ch/httpdocs/wp-includes/plugin.php(522): WP_Hook->do_action(Array)
#4 /home/httpd/vhosts/cascana.ch/httpdocs/wp-settings.php(622): do_action('plugins_loaded')
#5 /home/httpd/vhosts/cascana.ch/httpdocs/wp-config.php(103): require_once('/home/httpd/vho...')
#6 /home/httpd/vhosts/cascana.ch/httpdocs/wp-load.php(50): require_once('/home/httpd/vho...')
#7 /home/httpd/vhosts/cascana.ch/httpdocs/wp-blog-header.php(13): require_once('/home/httpd/vho...')
#8  in /home/httpd/vhosts/cascana.ch/httpdocs/wp-content/plugins/woo-payrexx-gateway/src/Model/PaymentMethod/Abstract/Base.php on line 7