Error while flashing NUCLEO STM32L432KC

Hi,

I am getting an error while trying to debug my new NUCLEO STM32L432KC board. I am using the STM32CubeIDE v1.1.0 on MacOSx Mojave. See the attached debug log for the error.

Error message from debugger back end:

Error finishing flash operation

Failed to execute MI command:

load /Users/***/Documents/STM32CubeIDE/MCU1/test/Debug/test.elf 

Any idea what is causing this?

Thanks

Edit:

So when I changed the debug probe to ST-LINK (OpenOCD) it works, why I doesn't with GDB server?