Why does nRF52 hrs sdk11 example sd_power_off return 6?

Hello all: I am running a nRF52832QF AAB0 pca10040 board with SDK11 in Segger embedded studio. I followed the 'getting started' tutorial.

After pressing button 1, I noticed an error handler was being triggered. It was the sd_power_system_off call in sleep_mode_enter. This error is also thrown when the device attempts to sleep after advertising times out.

The SD 132 v2.0.0 is initialized prior to this error being thrown. The error is 0x2006, not supported. Surely system off is supported on the nrf52...

Additionally I am using RTT logging if that may make a difference. I'm eager to get up and running with S132 3.0 and SDK12.