[workaround] fail to start debug after update eclipse CDT to 9.4.2, error message "ST-Link server not installed"
I had managed to roll back.
Hack configuration/org.eclipse.equinox.simpleconfigurator/bundles.info
to remove the new updated components.
By doing so the eclipse use CDT 9.4.0 indeed.
Now the system workbench for STM32 works fine to build/debugging.
An interested thing is that I still see the red notes of “ST-Link Server not installed on this machine” from “Debug Configuration” , “Debugger” , “ST-Link Client Setup”, but debugging session started all fine.