Running 7zip at the command line from a directory that contains the extracted files, I do get a working cbz. Note the addition of the
to force creation of a zip format file
Code:
7zz a -tzip efnpw8.cbz
Additionally file now correctly shows this as a zip file
Code:
file efpnw8.cbz
efpnw8.cbz: Zip archive data, at least v2.0 to extract, compression method=store