[Tails-testers] failing to start tails 5.0beta

Hello, trying to test tails 5.0~beta,
it fails...;on boot sequence..
I got that:
(initramfs) mount: mounting /dev/loop0 on //filesystem.squashfs failed:
invalid argument
Can not mount /dev/loop0 (/live/medium/live/filesystem.squashfs) on
//filesystem.squashfs

but first, all seem go ok with this message :
loading kernel
loading initramfs
booting tails

I've tried on the 3 modes {normal, troubleshooting and external disk} for
the same result...
Ah, the computer is le novo L540
and the usb-key a classical kingston 16 gb

sincerly yours, ask if you need more details or tests,
greatings
XXX