Some users has also reported this issue, we are still investigating the problem.
For some people, the antivirus scans every new build processes which significantly increase the build time. The solution is to add OpenSTM32 System Workbench installation location in the antivirus exception list.
For other ones, shutdown every network connections does fix compilation. Our team is investigating to locate where the problem comes from and will provide a fix ASAP.
Could you try these solutions ?
Sorry for inconvenience.