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.
We're still investigating but it seems to be a network configuration problem. The fact that you cannot collect neither System Workbench plugins nor Eclipse plugins make me think your web filter is blocking the update.