TCPDF error: Missing or incorrect image file: https://substackcdn.com/image/fetch/$s_!3Kp7!,w_1456,c_limit,f_webp,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2Fb181e746-ed01-4d21-828f-d182a4f7e982_4500x3000.jpeg