Second Python-based MCP server always fails with "uv venv failed" on Windows

On Windows 11 (Open Science v0.1.9), only one Python-based MCP server can be enabled. Example: - Literature Search → Success - Biomedical Databases → Fails If I reverse the order: - Biomedical Databases → Success - Literature Search → Fails So whichever Python MCP is enabled second always fails. The error is: ```text uv venv failed ``` I have already tried: - Fresh reinstall - Deleted `%AppData%\Roaming\com.ai4s.workbench` - Restarted Open Science - Verified `python -m venv` works - Manually installed `pip` with `python -m ensurepip` None of these solved the problem.