When trying to add a modpack icon, logo and background to a custom modpack a friend and I made, we continously got error 413 after trying to upload an image. The images were the correct size for the icon (50x50) and background (900x600) but even after reducing their quality to a horrendous amount, the error still occurred. The modpack and images in question are listed below. https://www.technicpack.net/modpack/tcservertemptestpack.1675416