current latest download of LinuxCNC V2.9.8 will not install GRUB on several PC's

I downloaded the 2.9.8 latest version from the first link in the download page
Burned this iso to a pen drive under windows using Rufus latest version
Live preview works fine
Graphic install consistently fails at the point of installing GRUB
         - this happened on numerous older PC typically inter dual core with 4GB to 8GB of RAM and installing to an SSD
As a trial I installed 2.7.4 which I had on a pen drive without issue

It should be noted the 2.9.8 installed perfectly onto a much newer NUC PC using the same pen drive

I have installed 2.9.7 without any issues and will (Debian 13) and will look to update to 2.9.8 tomorrow when time allows

Please advise if any more info is required
Regards,  Paul

As Tommy alludes to Grub errors are usually because you have secure boot enabled. Turn that off in the BIOS. Trixie is batter with secure boot but still better to disable it.