Secure Boot dbx Configuration Update Vostro 15 3510 Linux Ubuntu 20.04.5 LTS 77 -> 217

I'm not able to resolve Issue with this update since the dell staff in the country where I bought  the machine told me its not their problem When I turned to international support  they transferred me to back to the local technical support offices I would appreciate  if I could get assistance with this  Issue  please, Thanks 

Error: When Trying to Install Update says :  Unable  to  Update  "Secure Boot dbx  Configuration Update ";  Blocked  Executable in the ESP, ensure grub and shim are up to date: /boot/efi/efi.factory/boot/bootx64.efi  Authenticode cheksum [checksumcode] is present in dbx.

Description says : 

Version 217:

This updates the dbx to the latest release from Microsoft which adds insecure versions of grub and shim to the list of forbidden signatures due to multiple discovered security updates.

Before installing the update, fwupd will check for any affected executables in the ESP and will refuse to update if it finds any boot binaries signed with any of the forbidden signatures. If the installation fails, you will need to update shim and grub packages before the update can be deployed.

Once you have installed this dbx update, any DVD or USB installer images signed with the old signatures may not work correctly. You may have to temporarily turn off secure boot when using recovery or installation media, if new images have not been made available by your distribution.

Version 211:

This updates the dbx to the latest release from Microsoft which adds insecure versions of grub and shim to the list of forbidden signatures due to multiple discovered security updates.

Version 190:

This updates the dbx to the latest release from Microsoft which adds insecure versions of grub and shim to the list of forbidden signatures due to multiple discovered security updates.