I’m frustrated

Anyone else having issues connecting their Alesis Multimix to logic, since updating to High Sierra?

Ever since updating to High Sierra, I have failed to sync my Multimix to Logic pro, or even system preferences! I have contacted apple about this but they have already cost me 50 pounds for a new hard drive to back up to and god knows how many hours of frustration, reinstalling OS and drivers with no luck.

I imagine its a pretty easy fix but I have very little technical knowledge of these things. I really don't want to have to get rid of it.
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