img file can't be mount: wrong fs type, bad option, bad superblock on ...

[KnightOfCups]

Following the tutorial from Lineage on how to extract proprietary blobs from zip files, I downloaded 2 zip archives from Lineage nightly builds repo: lineage-20.0-20230609-nightly-beyondx-signed.zip and lineage-20.0-20230602-nightly-beyondx-signed.zip.
Finally I ended up with 2 different vendor.img that can't be mount:

# mount vendor.img system/vendor/
mount: wrong fs type, bad option, bad superblock on /dev/loop27,
       missing codepage or helper program, or other error

       In some cases useful info is found in syslog - try
       dmesg | tail or so.

[Fede2782]

Same also with me