T480 ram upgrade - not booting

I'm trying to install Catalina on my t480, I got past the installer using this EFI (modified).

But on boot I'm getting the attached error.

I'm installing to an external ssd and I added a 2nd 8gb stick of ram to the laptop. I'm thinking its because of the extra ram possibly? Do I need to generate a dsdt or dsdt file for this? I already added both 8gb sticks to the smbios config in the clover configurator.