Boot successfully repaired.

Please write on a paper the following URL:
http://paste.ubuntu.com/p/9PFFNdVxrh/

In case you still experience boot problem, indicate this URL to:
boot.repair@gmail.com or to your favorite support forum.

You can now reboot your computer.

Please do not forget to make your UEFI firmware boot on the Ubuntu 18.04.5 LTS entry (nvme0n1p7/EFI/ubuntu/shimx64.efi file) !
If your computer reboots directly into Windows, try to change the boot order in your UEFI firmware.

If your UEFI firmware does not allow to change the boot order, change the default boot entry of the Windows bootloader.
For example you can boot into Windows, then type the following command in an admin command prompt:
bcdedit /set {bootmgr} path \EFI\ubuntu\shimx64.efi