Fatal error: Uncaught Error: Call to undefined method Jetpack_Simple_Payments::is_enabled_jetpack_simple_payments() in /var/www/vhosts/mdszkolenia.pl/httpdocs/wp-content/plugins/jetpack/modules/widgets/simple-payments.php:552 Stack trace: #0 /var/www/vhosts/mdszkolenia.pl/httpdocs/wp-includes/class-wp-hook.php(298): register_widget_jetpack_simple_payments('') #1 /var/www/vhosts/mdszkolenia.pl/httpdocs/wp-includes/class-wp-hook.php(323): WP_Hook->apply_filters(NULL, Array) #2 /var/www/vhosts/mdszkolenia.pl/httpdocs/wp-includes/plugin.php(453): WP_Hook->do_action(Array) #3 /var/www/vhosts/mdszkolenia.pl/httpdocs/wp-includes/widgets.php(1474): do_action('widgets_init') #4 /var/www/vhosts/mdszkolenia.pl/httpdocs/wp-includes/class-wp-hook.php(298): wp_widgets_init('') #5 /var/www/vhosts/mdszkolenia.pl/httpdocs/wp-includes/class-wp-hook.php(323): WP_Hook->apply_filters(NULL, Array) #6 /var/www/vhosts/mdszkolenia.pl/httpdocs/wp-includes/plugin.php(453): WP_Hook->do_action(Array) #7 /var/www/vhosts/mdszkolenia.pl/httpdocs/wp-sett in /var/www/vhosts/mdszkolenia.pl/httpdocs/wp-content/plugins/jetpack/modules/widgets/simple-payments.php on line 552