I'm trying to download a copy of my invoices but it's not working. Under the Billing section, where there's the list of all the invoices, if I click at the end of a listing on the three dots, it gives the option to choose Invoice or Receipt. If I click on Invoice it just loads another Billings page in another tab exactly the same as the original one, not any invoice details. If I choose the Receipt option, the new tab opens with an Error 500 message. How can I get a copy of the invoices as I need them for tax returns?