I am clean installing 18.04 to a partition. All went smoothly until this error.

> 
> The 'grub-efi-amd64-signed' package failed to install into /target/. Without
>  the GRUB boot loader, the installed system will not boot.
> 
> 
> 

After pressing 'ok' the following opened:

> 
> **Installer crashed**
> 
> 
> We,re sorry the installer crashed. After you close this window, we'll allow you to file a bug report using the integrated bug reporting tool. This will gather information about your system and your installation process. The details will be sent to our bug tracker and a developer will attend to the problem as soon as possible.
> 
> 
> 

Has anybody had the same issue and had a resolution?