I posted a more or less similar question not that long ago but it doesn't seem to appear anywhere.
I have a presonus firestudio project and since I have updated to Mojave, non of the input are working. I can listen to anything on it, the output work but I can't record anything. It's a big issue for me because I play live with Ableton and synths/groovebox. If anyone can help, that would be great.
If not I guess I'll have to restore my macbook pro to high sierra but it would kind of suck.