Fatal error: Uncaught Error: Call to undefined method WPCF7_Shortcode::get_default_option() in /home/q8otp393o4rk/domains/itbn.gr/html/wp-content/plugins/contact-form-7-modules/hidden.php:114 Stack trace: #0 /home/q8otp393o4rk/domains/itbn.gr/html/wp-content/plugins/contact-form-7/includes/shortcodes.php(149): wpcf7_hidden_shortcode_handler(Object(WPCF7_Shortcode)) #1 [internal function]: WPCF7_ShortcodeManager->do_shortcode_tag(Array) #2 /home/q8otp393o4rk/domains/itbn.gr/html/wp-content/plugins/contact-form-7/includes/shortcodes.php(69): preg_replace_callback('/(\\[?)\\[(respon...', Array, '<h3>Interested ...') #3 /home/q8otp393o4rk/domains/itbn.gr/html/wp-content/plugins/contact-form-7/includes/classes.php(275): WPCF7_ShortcodeManager->do_shortcode('<h3>Interested ...') #4 /home/q8otp393o4rk/domains/itbn.gr/html/wp-content/plugins/contact-form-7/includes/classes.php(332): WPCF7_ContactForm->form_do_shortcode() #5 /home/q8otp393o4rk/domains/itbn.gr/html/wp-content/plugins/contact-form-7/includes/classes.php(170): WPCF7_ in /home/q8otp393o4rk/domains/itbn.gr/html/wp-content/plugins/contact-form-7-modules/hidden.php on line 114