Running coreboot utility returns syntax error

[spe42]

sudo bash ./coreboot_util.sh
./coreboot_util.sh: line 680: syntax error in conditional expression: unexpected token `('

See here:

Librem Mini PC, Pureboot will not recognize bootable USB, no OS

After many issues with PureOS, wanting to switch to a different Linux distribution, and an infuriating bout of basic commands in terminal putting out errors I did not know how to fix, I completely wiped my hard drive, and am attempting to reinstall an OS to get the machine working. However, similar to here: librem-11-seabios-coreboot-does-not-recognize-keyboard-pureboot-does-not-boot-usb and here: usb-not-recognized-in-bios-librem-mini-v2 I have been experiencing the issue of Pureboot not r…

@jonathon.hall