She included the screenshots in her post. This is the exact error message taken from her screenshot:
A fatal DirectX 11 error has occured. (11000002)
There's no other error message or report.

I am having the same issue and with shadowbringers dropping DX9 support I am very tempted to ask for a refund soon. I contacted the support to ask for a solution to this problem via email but they didn't give me any recommendation yet.
I have also tried most of the steps above and from different topics or even reddit to fix the problem as she mentioned and I can also say that nothing of it fixed my issue:

Creating a new account on my pc and running the game there
Uninstalling the game and reinstalling
clean install of all drivers, also updated them to the newest version which released just 2d ago and promised compatibility with the new win10 update... but didn't help after all.
Virus scans
Cleaning and fixing up my registry with 3rd party software
Undercloacking my GPU
Swapping HDMI cable and opening my PC to remove dust just to be sure it's not hardware related
Turning off overlays
Uninstalling Dropbox
Turning off startup programs
Running the game in compatibility mode
Running the game in Administrator mode
Checked my PC temperature, checked GPU workload
Ensured that dxdiag shows no error message
Ensured my GPU shows no error message

As for reference if I am playing the benchmark, I have a probability of crashing 9/10 times, if it randomly runs to the end it tells me my PC score is extremely high.

As of in the normal game, the crash happens at a random times doing random things.
I can crash in an empty city, in a crowded place, in a 4man dungeon but then against all odds I can just 24man raids just fine. So it seems to be unrelated to "doing specific things ingame"
I can run the game fine for hours but then suddenly crash 3 times in a row.

As an observation aside from the game:
- I feel like it's been crashing less before win10 forced their stupid new update onto me (but still its been occasionally crashing before as well.)
- My screen looses its signal whenever the crash happens, so maybe that helps identify the issue?

I don't know why you have to drop DX9 for something that instable. Especially while there's many known issues among players.
During my research on how to fix my issue Ive come across soooo so many people who have the same issue and nothing has been completely fixed.
Are we just all supposed to quit the game?