Tested until 1.5.5, still the same error

What do you mean with "most demos"?
The TressFX demo sometimes starts successfully here, seems to be a buggy app.
The TressFX app also only loads System32 DLLs which makes both testing it on Windows as well as recording apitraces impossible. I'm not going to waste any time trying to figure out what might be wrong here.
Almost every .exe binary I can download that uses DirectX 9/10/11.
It ends in a loop with lots of repetitive log messages before giving up the error.
What do you mean by "sometimes starts successfully" and "only loads System32 DLLs"? What other DLLs is it supposed to load?
What are good examples that I can test?
What do you mean by "sometimes starts successfully"
I mean that it works ~half the time here and crashes in its own code otherwise. Same thing happens with wined3d so I'm not really sure if this is really our bug.
What other DLLs is it supposed to load?
DXVK and Apitrace on Windows only work if I can place the respective DLLs next to the executable. This doesn't work here because they don't get loaded, which makes debugging an app like this very annoying.
Almost every .exe binary I can download that uses DirectX 9/10/11.
Well it clearly works fine in hundreds of actual games and also in a whole bunch of tech demos, so things not working should be the exception, so "everything" isn't exactly a helpful answer here.
Nothing extracted yet.
I have installed dxvk 1.8.1 precompiled release on Wine 6.3 on my Ubuntu 20.10 following README.md and I cannot run most of the demos (only very elementary ones which display a cube).
Let's take for example the AMD TressFX DX11
Software information
AMD TressFX DX11
System information
Apitrace file(s)
Log files