No Boot Loader after Ubuntu Installation (18.04.2 LTS)

I’ve recently purchased a new laptop and i wanted to install Ubuntu, replacing Windows 10. After setting my BIOS CSM Support to Enabled and Secure Boot to Disabled, i proceeded with my ubuntu setup. I selected “Erase disk and install Ubuntu” choice but after a successful installation, when i rebooted my laptop instead of launching GRUB my BIOS appeared telling me there was nothing to boot.