I've seen other threads about the issue:
There seem to be an issue with the way nrf52840 dongle is partitioned. I need to create static partitions using pm_static_nrf52840dongle_nrf52840.yml, also there's a github example, but it looks like it requires older sdk 1.9.1 and segger studio... and I just struggle to make it work.
I have nrf52840dk and it just works out of the box...
can someone please help, all I need is a simple example to flash it, connect to zigbee and 1 led control working