"SEV: failed to get status. Error: 0x0" boot error

I was installing these libraries https://github.com/Drewol/unnamed-sdvx-clone/blob/master/build.linux so I would be able to build unamed soundvoltex clone when my system suddenly froze when trying to extract [http://download.sourceforge.net/libpng/libpng-1.6.24.tar.gz]. I was forced to restart and now I can not boot into Zorin as it just gives me the above boot error after I decrypt my drive.

All help is greatly appreciated!

I know offhand that this affects GDM, so I must assume you are using Zorin Core or Zorin Ultimate?

Core edition. Sorry for not including that!

Can you reboot and hold the Left Shift key to bring up the Recovery Menu?
In the recovery menu, tab down to “Drop to Prompt” and hit the enter key to begin; then enter in

uname a

and relay that printout here?

Sure thing.

The first link you posted in the OP leads only to an error fetching that page. Can you correct that so we can see the packages?
I am guessing you are running on AMD?

I got:
Linux desktop 5.4.0-65-generic #73~18.04.1-Ubuntu SMP Tue Jan 19 09:02:24 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux

Ok, so that means it is not a kernel bug.
You might try enabling secure encrypted virtualization in your BIOS:

After setting, reboot and see if you can boot up normally. If not, may need to Left Shift into the recovery menu and ‘sudo apt remove --purge’ the files you installed.

Is there an easier way to locate the packages besides using “sudo apt-get --list”?

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You can see most recently installed with timestamps:

grep " install " /var/log/dpkg.log

I removed all the packages that I had installed recently but I had no luck fixing this issue. I made a backup earlier today so it’s not the end of the world if I am not able to fix it. Thank you so much for your help!

It is odd since the SEV error usually is not critical and does not stop normal boot.
While in recovery Prompt, check if your desktop is still installed and something was not Removed

sudo apt install zorin-os-desktop

I accidentally went to this screen from my bootloader and apparently I am getting some form of gpu error.

Yes, I am seeing GDM, there.
For kicks… what happens if you install and switch to LightDM, (temporarily, even)?

https://ibb.co/Rj8ftjC When I try to install, apt-get update is throwing lots of errors too

Try backing out of prompt to the Recovery Menu, tab down to Enable Networking- enter that and enable networking. Then back out of that to the Recovery menu again and Drop to Prompt again and run sudo apt update first, just to ensure you are connected. Then try installing LightDM.

This looks like a good sign