Damn, I'm having this exact same problem.
Haven't used my DEQX HDP3 in 7 years, dug it out, popped windows parallels on 2021 MacBook Pro that only has 2 usb c ports which I assume are identical, so don't have the choice of picking USB audio or USB control. With DEQX Cal up and running it simply won't connect to MacBook and I get the same "LINK_INT TRASH" messages that Todd (orginal poster) got.
Thinking maybe if get a shorter USB B to USB C cable (current one is very long and am using USB A to USB C adapter to connect to mac.
I know this is a very old thread, but it was cool to find someone in this big wide world with the same problem, but looks like my solution is going to have to be a bit different.
Trevor