Comment # 1 on bug 1207243 from Daniel Wagner

This message is triggered when user space tries to read

  /sys/class/nvme/nvme0/nvme0n1/uuid

Given that the normal boot process doesn't work indicates that systemd waits
for a device to appear with a given uuid. 

Can you provide information on the nvme device?

  nvme id-ctrl /dev/nvme0