Error: Can not mount the device to '/Volumes/X' & Disappearing Mount Folder

[andreysamode]

I'm running simple-mtpfs on OS X with homebrew and while attempting to mount the device with "simple-mtpfs -v /Volumes/X", I get the following error: "Error: Can not mount the device to '/Volumes/X'."

I see the device in the list—"1: VariousViewpia DR/bq Kepler", /Volumes/X exists. There's nothing in system log.

When I try to run it with sudo, the output says "Connected", but the /Volumes/X simply disappears. I can't see it or cd into it.

df shows this: simple-mtpfs@osxfuse0 56623656 2070184 54553472 4% 0 0 100% /Volumes/X

After "sudo umount /Volumes/X", the X folder is still gone.

Any ideas? Thanks.