After following the steps in this post How can I prevent Windows from overwriting GRUB when using a dual-boot machine - Unix & Linux, I'm now presented with the "GNU Grub version 2.02" black screen upon attempted boot.
I have tried this: GNU GRUB Version 2.02 beta 2-9 while booting from USB, this: How to Fix - GNU GRUB version 2.02 error Ubuntu - Minimal BASH Like Line Editing is Supported - YouTube, and boot-repair.
Boot-repair gives me "Please close all your package managers (Software Center, Update Manager, Synaptic, ...). Then try again." message when nothing is opened. Here is the bis: http://paste.ubuntu.com/p/t8yhwRnpW9/.
I'm completely at a loss for what else to try and I need to be able to boot into Ubuntu to work (no chance to reinstall).