The file or folder udi=/org/kde/solid/udev/sys/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.2 does not exist.

$ solid-hardware details /org/kde/solid/udev/sys/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.2
udi = '/org/kde/solid/udev/sys/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.2'
  parent = '/org/kde/solid/udev'  (string)
  vendor = 'Microsoft'  (string)
  product = 'Lumia 550 (RM-1127)'  (string)
  description = 'Lumia 550 (RM-1127)'  (string)
  Block.major = 189  (0xbd)  (int)
  Block.minor = 134  (0x86)  (int)
  Block.device = '/dev/bus/usb/002/007'  (string)
  Camera.supportedProtocols = {'ptp'}  (string list)
  Camera.supportedDrivers = {'gphoto'}  (string list)
  PortableMediaPlayer.supportedProtocols = {'mtp'}  (string list)
  PortableMediaPlayer.supportedDrivers = {'usb'}  (string list)