TCPDF error: Missing or incorrect image file: https://substackcdn.com/image/fetch/$s_!9FVp!,w_1456,c_limit,f_webp,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F4fb6d8c5-1c05-48b4-a4f3-468555f0e447_5214x3335.jpeg