I have had the same problem start after jump starting our 14 Kluger. We have done a few factory updates over the years and have had no issues so far.
Have so far attempted:
holding down power button to reset system.
disconnecting the negative terminal.
disconnecting negative terminal and pumping brakes three times (saw it online..)
holding Apps buttons and turning lights on three times like you tube video mentioned above.
so far the loading bar still gets stuck a couple of mm from the end and we are left with no radio, Bluetooth, reverse camera or USB port under the stereo. Anyone had any solutions to this problem before I go and spend a heap of coin with Toyota?