uuk0

This is caused by the wrong pyglet version; you need pyglet < 2.0, at the moment the latst version < 2.0 is 1.5.29 Pyglet 2.0 was a breaking change, changing...

If you used pip, first uninstall: "\ -m pip uninstall pyglet", and than reinstall the version you want by "\ -m pip install pyglet==1.5.29"