Particle Debugger Nano2 Ubuntu Serial Port upload not working


I’m unable to upload a sketch to a Redbear Nano2 BLE using the Particle debugger.
I have the correct Board, Port and Programmer choosen.
DAPLINK is showing on my desktop.
I’ve installed DAPLink_V1.0_Interface_nRF52.bin

Is there any step I’m missing?

I’m also unable to Burn Bootloader

The error given is:

Open On-Chip Debugger 0.10.0-dev-00254-g696fc0a (2016-04-09-12:07)
Licensed under GNU GPL v2
For bug reports, read
debug_level: 1
adapter speed: 10000 kHz
cortex_m reset_config sysresetreq
in procedure ‘init’
in procedure ‘ocd_bouncer’

An error occurred while uploading the sketch