Can't find the Invoice Number of an order

I bought the Shap-E - Text-to-3D tool, it was on 50% sale and to use it I need to insert the order Invoice number. The problem is that when I go in my Order History I can see all the info about the order, but not the Invoice number, as can be seen in the image, the field is simply blank. What can I do to get the number? Thanks.

Nevermind, I had to wait a couple of hours