Cannot install Ubuntu MATE because of "error: file '/boot/' not found."

[riccardoperraa]

I created the live USB installation media with balenaEtcher using a downloaded Ubuntu MATE ISO (ver. 18.04.2 64-bit). Right before the grub appears, i get the error "error: file '/boot/' not found." and when I select the "Try Ubuntu MATE without installing" option, it just shows a black screen.

[ubfan1]

1) Did you md5sum check the downloaded iso?
See https://help.ubuntu.com/community/HowToMD5SUM
Check the number against the listing in the link for your release listed at
http://releases.ubuntu.com under the MD5SUMS link.
For other releases' hashes, like lubuntu, see:
https://help.ubuntu.com/community/UbuntuHashes
2) If using a CD/DVD, did you burn the disc as slowly as possible?
See https://help.ubuntu.com/community/BurningIsoHowto
If using USB install media, use a tool like unetbootin or rufus.
Don't just copy files to the USB.
See https://help.ubuntu.com/community/Installation/FromUSBStick
3) Did you select the media check before trying to install?
See https://help.ubuntu.com/community/Installation/CDIntegrityCheck
4) Did you ever do a "memory check" (perhaps another live-media menu choice) on your PC?
Doing the above can save you a lot of time struggling with a bad install media or
hardware problems.