https://devzone.nordicsemi.com/f/nordic-q-a/121674/kmu-on-nrf54l15-soc-custom-pcbHey All! I&#39;ve been following the nRF Connect SDK Intermediate course from DevAcademy. In exercise 2 of lesson 9, bootloaders, you get to learn how to use KMU (Hardware Key Management Unit) for the nRF54L15, which I am using on a custom PCB, when followingen-USTelligent Community 13Thu, 22 May 2025 11:51:15 GMThttps://devzone.nordicsemi.com/thread/536609?ContentTypeID=1Thu, 22 May 2025 11:51:15 GMT137ad170-7792-4731-bb38-c0d22fbe4515:87eb70d6-7058-4bee-a1e4-3d3509dcf146Hieu<p>Hello Vital,</p> <p>Could you please update your <span style="font-family:&#39;courier new&#39;, courier;">nrfutil</span> and its <span style="font-family:&#39;courier new&#39;, courier;">device</span> command, then try again?</p> <p><pre class="ui-code" data-mode="text">nrfutil self-upgrade nrfutil install --force device=2.8.8</pre></p> <p>Regards,</p> <p>Hieu</p><div style="clear:both;"></div>