Grub error while trying to install ubuntu 20.04 LTS by bootable usb done through rufus

I have done the part of creating a bootable usb for dual booting ubuntu 20.04 LTS through rufus But after restarting the laptop and choosing the usb ,I am getting a grub menu saying minimalist bash like editing is suported,with the grub menu
Can anyone please guide me how to proceed for the installation?
I am having nvme ssd.