Help! when i try to print order i get error

When i try to print order ri get this message and the only text of the order, i am not an expert but i need the help please

Notice: Undefined variable: order_info in /nfs/c05/h05/mnt/160270/domains/skp.mx/html/tienda/system/storage/modification/admin/controller/sale/order.php on line 1943

Could you please share the following file, so that we can check the issue. Also let us know exactly which version of Opencart are you using and have you installed any third party module to make changes in checkout, order or invoice system?

/system/storage/modification/admin/controller/sale/order.php

sure, here it is