Problem last patch on Big Sur

[axelv73]

Hi, all ok but I have a problem with the last patch on the last reboot.

I write the command /Volumes/Image\ Volume/patch-kexts.sh /Volumes/Macintosh\ HD/ and it gives me an error

No WiFi option specified on command line, so checking for 802.11ac...
No 802.11ac WiFi card detected, so installing mojave-hybrid WiFi patch.
No patch mode specified on command line. Detecting Mac model.
(Use --2010, --2011, or --2012 command line option to override.
Detected model: Macmini6, 1
Detected a 2012-2013 Mac. Using --2012 patch mode.
Installing kexts to:
/Volumes/Macintosh HD/
Volume appears to have a Big Sur installation (build 206918). Continuing.
Volume is mounted from device:
/dev/disk2s5
Mounted device is an actual volume, not a snapshot. Proceeding.
System Integrity Protection is off.
Restart the machine for the changes to take effect.
Successfully disabled authenticated root.
Restart the machine for the changes to take effect.
Remounting volume as read-write...
mount: unknown special file or file system /Volumes/Macintosh HD/.
Remount failed. Kext installation cannot proceed.

Can you help me?