15:40:33 During initialization the error "'qt4agg' is not a valid value for backend; supported values are ['GTK3Agg', 'GTK3Cairo', 'GTK4Agg', 'GTK4Cairo', 'MacOSX', 'nbAgg', 'QtAgg', 'QtCairo', 'Qt5Agg', 'Qt5Cairo', 'TkAgg', 'TkCairo', 'WebAgg', 'WX', 'WXAgg', 'WXCairo', 'agg', 'cairo', 'pdf', 'pgf', 'ps', 'svg', 'template']" occurred in /home/lyoule/.local/share/FreeCAD/Mod/Animation/InitGui.py
15:40:33 Please look into the log file for further information
中文 
请教诸位大拿：有谁知道freeCAD插件Animation出现错误怎么办？
15:40:33 During initialization the error "'qt4agg' is not a valid value for backend; supported values are ['GTK3Agg', 'GTK3Cairo', 'GTK4Agg', 'GTK4Cairo', 'MacOSX', 'nbAgg', 'QtAgg', 'QtCairo', 'Qt5Agg', 'Qt5Cairo', 'TkAgg', 'TkCairo', 'WebAgg', 'WX', 'WXAgg', 'WXCairo', 'agg', 'cairo', 'pdf', 'pgf', 'ps', 'svg', 'template']" occurred in /home/lyoule/.local/share/FreeCAD/Mod/Animation/InitGui.py
15:40:33 Please look into the log file for further information