Files that cannot be opened by ZipFile

[wf-soft]

using (var zip = new ZipFile(@"D:\1.7z")) {
    Console.WriteLine(zip);
}

throw
"Cannot find central directory"

Since the .7z file could not be uploaded, I put it in the .zip file

1.zip

I try to use some other packages such as SharpCompress, which can be read normally.