Development tools for Zephyr on STM32Workbench for Zephyr: VS Code extension to set up, build, flash and debug Zephyr applications on STM32.Devicetree manager: browse, edit and visualize Zephyr devicetree, STM32CubeMX-like for Zephyr.
Could you check that you have the latest versions of the SW4STM32 installed (Help->Check for updates) ? Your issue looks like a path length problem we had in SW4STM32 and which has been fixed in 1.5.2 for IDE plugin.