The reason why the Alibaba Icon Library cannot be downloaded may be that the system does not support it. Specifically, the Alibaba Icon Library is a powerful vector icon library that provides vector icon download, online storage, format conversion and other functions, but it cannot download .ico files. This may be because the system does not support it or the library itself does not provide .ico format download. If you need to use the icons in the Alibaba Icon Library, you can try using other formats, such as SVG, PNG, etc. These formats can be widely supported and can be downloaded and used in various ways. If you need more specific help, you can contact the official support team of the Alibaba Icon Library, who may provide you with more detailed answers and solutions.