The attribute error has nothing to do with the logo. I have the same issue on my windows system that you do. However, on my live website, hosted on a Linux domain server, I do not have a problem. So while I haven’t resolved the issue, I think it has to do more with PDF generation on my XAMPP setup; possibly because it doesn’t have an SSL implementation. That is, the logo URL used, uses https and not http. This is something I’ll test later to see if that is the case.