Fatal error: Uncaught Error: Call to undefined function wp_is_serving_rest_request() in /var/www/u0320301/data/www/xn----7sbej3cebifjid9il.xn--p1ai/wp-content/plugins/contact-form-7/includes/submission.php:54 Stack trace: #0 /var/www/u0320301/data/www/xn----7sbej3cebifjid9il.xn--p1ai/wp-content/plugins/contact-form-7/includes/controller.php(17): WPCF7_Submission::is_restful() #1 /var/www/u0320301/data/www/xn----7sbej3cebifjid9il.xn--p1ai/wp-includes/class-wp-hook.php(322): wpcf7_control_init() #2 /var/www/u0320301/data/www/xn----7sbej3cebifjid9il.xn--p1ai/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters(NULL, Array) #3 /var/www/u0320301/data/www/xn----7sbej3cebifjid9il.xn--p1ai/wp-includes/plugin.php(565): WP_Hook->do_action(Array) #4 /var/www/u0320301/data/www/xn----7sbej3cebifjid9il.xn--p1ai/wp-includes/class-wp.php(418): do_action_ref_array('parse_request', Array) #5 /var/www/u0320301/data/www/xn----7sbej3cebifjid9il.xn--p1ai/wp-includes/class-wp.php(813): WP->parse_request('') #6 /var/www/u0320301/data/www/x in /var/www/u0320301/data/www/xn----7sbej3cebifjid9il.xn--p1ai/wp-content/plugins/contact-form-7/includes/submission.php on line 54