I had the same problem with the same error message but with a different DAC. Despite countless discussions on different forums I couldn’t solved it until, by luck, I booted my RPi4 8GB without the dongle of my wireless keyboard (which I was using for LibreELEC or for booting from PINN).
After removing the USB dongle from my RPi4 the problem dissappeard, it’s working flawlessly. When I’m connecting a wireless keyboard or a simple wireless mouse the problem reappears. I tried all combinations of USB 2.0 and 3.0 ports, it’s not working if I have both DAC and keyboard connected to my RPi4.
I have the same problem when using LibreELEC for example, I don’t have sound over USB until I remove the keyboard’s dongle.
I don’t have this problem when using my old RPi3, it is happening only with my RPi4 and I didn’t find a solution, no one seems to know why this is happening. It is definitely a bug but I don’t know to what is related. To the RPi4 firmware, to the software or a combination of these.