After downloading the .iso file and chcked it with MD5, I used Rufus (Windows 10) to make the Live USB flash drive.
When booting from the USB flash drive I get the following message:
[ 0.118288] x86/cpu: SGX disabled by BIOS.
BusyBox v1.30.1 (Ubuntu1:1.30.1-7ubuntu3) built-in shell (ash)
Enter 'help' for a list os built-in commands.
(initramfs) mount: mounting /dev/loop0 on /filesystem.squashfs failed: Input/output error
Can not mount /dev/loop0 (/cdrom/casper/filesystem.squashfs) on /filesystem.squashfs
I also tried a USB flash drive made with LiLi (Windows 10) and I get the same message. And tried a second USB flash drive.
Is there any specific BIOS/UEFI configuration that I must check/set?