[fedora-arm] Boot issues with Sugar On A Stick

Hi Folks - I am trying to set up Sugar On A Stick for Raspberry Pi 3+, but am running into a boot issue. The boot process runs properly until it gets to "Reached Target Basic System", and then it hangs at "A start job is running for dev/dis...1fe03C48" at which point there is no further progress. Has anyone else had a problem like this, and if so, what is your workaround/solution? Thanks! Garry