error to pay products

i have this error. is not posible to use this plugin. i have wordpress 4.9.1 and woocomerce pos 0.4.17

{“code”:”rest_invalid_param”,”message”:”Par\u00e1metro(s) no v\u00e1lido(s): line_items”,”data”:{“status”:400,”params”:{“line_items”:”line_items[0][tax_class] no es del tipo string.”}}}