I messed up grub using grub customizer . anyone can help?

nexus7@nexus7-Lenovo-ideapad-320-15AST:~$ sudo update-grub
Sourcing file /etc/default/grub' Sourcing file /etc/default/grub.d/init-select.cfg'
Generating grub configuration file ...
Found theme: /usr/share/grub/themes/zorin/theme.txt
Found linux image: /boot/vmlinuz-5.15.0-53-generic
Found initrd image: /boot/initrd.img-5.15.0-53-generic
Found linux image: /boot/vmlinuz-5.15.0-52-generic
Found initrd image: /boot/initrd.img-5.15.0-52-generic
Found Windows Boot Manager on /dev/sda2@/EFI/Microsoft/Boot/bootmgfw.efi
Adding boot menu entry for UEFI Firmware Settings
/etc/grub.d/40_custom_proxy: 6: Syntax error: Unterminated quoted string
Screenshot from 2022-11-28 16-38-16

My standard recommendation is - to not use Grub Customizer.

The script I am looking it is... well, it has a lot of symbols. following grubcfg_proxy, there is a space (white noise) a double-quote symbol all alone...
then you have a series of symbols standing alone - an open bracket that never gets closed, single-quotes on either side of it, another lone double quote between them...
From reading it, I cannot tell what the goal is in order to suggest any kind of fix.

What file paths are you referencing? What commands is the script giving?

i was making the grub timeout a bit lower and on updating the grub i got this error
/etc/grub.d/40_custom_proxy: 6: Syntax error: Unterminated quoted string . later i restarted the machine and nothing wrong happened . so i dont really if it was a serous thing or not

It only means that the customization you were trying to apply will not work.

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