Installation Netrunner 18.03

Hello. I’m trying to install Netrunner 18.03, 64 bit on a desktop mini pc with UEFI bios. I created a bootable usb pen, connected to the mini pc and part live. So far, all right. The problem is when I do the installation. At the end, this message comes out: I attach photos…

How do I solve the problem?

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We like to help you with this. Though we cannot reproduce the issue and the error message only tells us that grub installing went wrong.

Can you maybe execute the install again from a terminal
kdesudo calamares -d and log and save the output until it failed. This might help debugging the issue a little.

You can then also open a new bug with the log data here: https://github.com/calamares/calamares/issues