You are not upgrading from an up-to-date mirror. This is a bug that was fixed several days before the release of 18.04. Please ensure you are installing shim-signed 1.34.9 or later.
You are not upgrading from an up-to-date mirror. This is a bug that was fixed several days before the release of 18.04. Please ensure you are installing shim-signed 1.34.9 or later.