Flashing firmware onto NXP QN9020 via SEGGER J-Link
Your debugger is not properly connected. Telltale sign:


  VTref=0.000V


Modern debuggers usually allow a wide target voltage range. Their level shifters will be set to the target voltage VTref.

But that also means there will be no output if VTref is zero volts.

Note: The above J-Link EDU Mini does not have level shifters, and is thus unsafe to use for any other target voltage than about 3.3 Volts. But it can still measure VTref, and needs this pin properly connected.