TCPDF error: Missing or incorrect image file: https://substackcdn.com/image/fetch/w_1456,c_limit,f_webp,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F846b40dd-df19-430b-b6e8-c3edea10dd3a_5973x3982.jpeg