I am facing an issue while booting. When the grub screen loads, it shows an error "Invalid Filter Value"
Yesterday I had replaced the background, grub-4x3 and grub-16x9 images in the /boot/grub/themes/kali, I wanted to change the background of the grub menu, but then after rebooting, I was not getting the changed background, instead was showing this error.

It does boot, but the grub theme is gone.

Please someone help.

Awaiting reply.
Thanking you in advance.