fsck.ext4 -n exited with status code 8
e2fsck 1.47.0 (5-Feb-2023)
ext2fs_open2: The ext2 superblock is corrupt
fsck.ext4: Superblock invalid, trying backup blocks...
fsck.ext4: The ext2 superblock is corrupt while trying to open /tmp/3047204436.img
fsck.ext4: Trying to load superblock despite errors...
ext2fs_open2: The ext2 superblock is corrupt
fsck.ext4: Superblock invalid, trying backup blocks...
fsck.ext4: The ext2 superblock is corrupt while trying to open /tmp/3047204436.img

The superblock could not be read or does not describe a valid ext2/ext3/ext4
filesystem.  If the device is valid and it really contains an ext2/ext3/ext4
filesystem (and not swap or ufs or something else), then the superblock
is corrupt, and you might try running e2fsck with an alternate superblock:
    e2fsck -b 8193 <device>
 or
    e2fsck -b 32768 <device>