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.
Can SW4STM32 please tell us what they have changed in the .cproject or .project files so that this error disappears? This way we could apply that change to other projects having this issue.