Can't get past Option 3 Reboot System

[fdkin1]

During installation of TrueNAS Core V12 0.5 I cannot get past the Reboot System option. I select 3 Reboot System, press Enter it reverts to Option 1. If I press the O from OK at the bottom of the window, nothing happens and am not sure how to complete the install.
I'm using two OCZ Agility 3 SSD to install the software. I'm new to TrueNAS - this is my first installation and didn't expect to fall at the first.
Thanks in advance.

 

[fdkin1]

Here's where the install gets upto...

 

[fdkin1]

Looks like a simple press of the reset button has done the trick.
However, because I had not set up my boot disk priority after the reboot, it is looking like one of my SSD boot disks is no longer available and showing up in the UEFI and the SSD I was intending to use as a cache disk is no longer showing as available in the console. I hope they have not been destroyed in the process. I reinstalled from the USB stick and only one of my SSDs was showing as available.