I get the following error when I try and save to MBR in Grub Customizer.

enter image description here

It used to work OK, it there something I need to do to make changes to the Grub Menu stick?


Fixed it!

Start Terminal and load your file browser (I use Dolphin) with the following command

sudo dolphin /usr/sbin/

Navigate to the file grub-bios-setup, right click on the file name and select permissions. Make sure that the file has the correct permissions:

enter image description here

All done

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