Server error log after update

Hello,

After update to version 3.1.4. during the orders export, I began to notice the following errors:

parent was called incorrectly. \xd0\xa1\xd0\xb2\xd0\xbe\xd0\xb9\xd1\x81\xd1\x82\xd0\xb2\xd0\xb0 \xd1\x82\xd0\xbe\xd0\xb2\xd0\xb0\xd1\x80\xd0\xb0 \xd0\xbd\xd0\xb5 \xd0\xb4\xd0\xbe\xd0\xbb\xd0\xb6\xd0\xbd\xd1\x8b \xd0\xb1\xd1\x8b\xd1\x82\xd1\x8c \xd0\xb4\xd0\xbe\xd1\x81\xd1\x82\xd1\x83\xd0\xbf\xd0\xbd\xd1\x8b \xd0\xbd\xd0\xb5\xd0\xbf\xd0\xbe\xd1\x81\xd1\x80\xd0\xb5\xd0\xb4\xd1\x81\xd1\x82\xd0\xb2\xd0\xb5\xd0\xbd\xd0\xbd\xd0\xbe. Backtrace: do_action(‘wp_ajax_order_exporter’), WP_Hook->do_action, WP_Hook->apply_filters, WC_Order_Export_Admin->ajax_gate, WC_Order_Export_Ajax->ajax_export_download_bulk_file, WC_Order_Export_Ajax->build_and_send_file, WC_Order_Export_Engine::build_file_full, WC_Order_Export_Data_Extractor::fetch_order_data, WC_Order_Export_Data_Extractor::fetch_order_products, WC_Order_Export_Order_Product_Fields->get, WC_Abstract_Legacy_Product->__get, wc_doing_it_wrong. This message was added in version 3.0.

Errors are the same and there are a large number of it.

Please tell me what is the matter and how can this be fixed?

Waiting for your reply.

Thanks