I can help you edit your invoice, NickFury8458.

I would like to ask what's the error message you've received when trying to edit the invoice. 

Meanwhile, we can do troubleshooting steps to help resolve this. Let's start by using a private browser and try to edit your invoice from there. Private browsing disables browser's cache. If it works, go back to the regular browser and clear the cache. Too much cache results to unusual behavior. Also, try to use a different browser like Google Chrome, Internet Explorer, or Mozilla Firefox.

Please let me know how it goes. I'd be happy to help you further. Have a great day!