The menu item Help/About Plugin brings up a dialog showing the plugins found and potential load error messages. If you get the error message like 无法加载库 ...
ℹ️ Created in 2016 by Pierre Raybaut and maintained by the PlotPyStack organization. ℹ️ PlotPy V2 is the new major release of guiqwt: same team 🏋️, same goal 🎯, same long-term support ⏳.