Zephyr Workbench, a VSCode extension to manage Zephyr on STM32.
It enables users to easily create, develop, and debug Zephyr applications.
Main features:
Install host dependencies.
Import toolchain and SDK.
Create, configure, build and manage apps.
Debug STM32.
You can directly download it from the VSCode marketplace
For more details, visit the Zephyr Workbench
It can be related to your ST-Link V2-1 Firmware version, could you please identify the version embedded on your nucleo ?
(you can read it form ST-Link Utility log or from openocd console ...)