System Workbench for STM32

Hi,

The project generated by CubeMX is not complete (I think it will be fixed in the next version), that's why System Workbench cannot find the OpenOCD script.

I suggest you to go into the project properties :
C/C++ Build > Settings > Target, select the "NUCLEO-L053R8" in the board area then apply.

Try to recreate a debug configuration to download the code.

Hope it will work.
Kevin.