However, I can search the serial number of my Nucleo board's ST-LINK. But when I start debugging, it fails to start. The IDE version is 1.4.2 from clean install and from upgrade from 1.3.x. If I start the GDB server as explained in some other discuss...

I have 1.3.1 STM32CubeIDE. When I choose the generation for full assert the tool generates invalid declaration:stm32l4xx_hal_conf.h (r. 427 ->)/* Exported macro ------------------------------------------------------------*/ #ifdef USE_FULL_ASSERT /*...