Installed Mint on secondary hard drive, now kernel panic when boot from usb

Software
1

Hello All,

Have brand new Librem 13

Have PureOS running on primary HDD

Installed Mint on other secondary HDD - works fine.

Now when I boot from USB (for anything else) says Kernel Panic. See image below

IMG_20180228_100819
IMG_20180228_1008192851×2138 2.32 MB

[Album] Pls halp