How do I reload/reinstall a kernel extension driver, solving this error: Filesystem error: Invalid ownership (501:0) should be (0:0)?

For solving a problem with a drive, I had to uninstall/unload an external SSD Samsung driver. Doing this, was reasonable easy: disable SIP in Recover (csrutil disable), rebooting, sudo kextunload /..., then rm -rf /.... Driver unloaded and gone. I backuped the driver thinking doing the opposite was that trivial, but looks it's not. I copied back the file in: /Library/Extensions, then I tried to reload the driver. I tried with sudo (sudo kextload /Library/Extensions/SamsungPortableSSDDriver.kext), disabling again SIP, even from root shell (sudo -i). Nothing seems to work. This is the error message: Filesystem error: Invalid ownership (501:0) should be (0:0) on /Library/Extensions/SamsungPortableSSDDriver.kext Any clue? Thank you.