File Content: additional-settings.php <?php trait WPCF7_ConfigValidator_AdditionalSettings { /** * Runs error detection for the additional settings section. */ public function validate_additional_settings() { $section = 'additional_settings.body'; if ( $this->supports( 'deprecated_settings' ) ) { $deprecated_settings_used = $this->contact_form->additional_setting( 'on_sent_ok' ) || $this->contact_form->additional_setting( 'on_submit' ); if ( $deprecated_settings_used ) { $this->add_error( $section, 'deprecated_settings', array( 'message' => __( "Deprecated settings are used.", 'contact-form-7' ), ) ); } else { $this->remove_error( $section, 'deprecated_settings' ); } } } } Submit