Errors [MODSIGN: Couldn’t get UEFI db list ] and Couldn’t get size: 0x800000000000000e

Linux
#1

I am trying to install Lubuntu 18.04 on a MacBook pro with no operating system. When I try to boot up I get these errors:

79279230_10157614270447593_5452028887087185920_o
79279230_10157614270447593_5452028887087185920_o960×720 103 KB

[MODSIGN: Couldn’t get UEFI db list ]

and
Couldn’t get size: 0x800000000000000e

#2

Go to your bios settings and turn off UEFI and secure boot. Can you boot, now?