Seems you have downloaded the .zip file successfully.
Have you unpacked the zip archive to some directory on your Windows 11 computer?
A screenshot of the situation would clarify what is going on, like Runey suggested. Show directory listing, the File Explorer screen of the directory where the zip file is and of the directory where files unpacked from the zip went.
Is the free space on the disk? The unpacked files are about 13 Gbytes.