Traceback (most recent call last):


 "/mnt/c/Users/user/Documents/code/stoptracking/playbook/.mitogen/mitogen-0.2.9/mitogen/service.py", line 621, in _on_service_call

return invoker.invoke(method_name, kwargs, msg)


 "/mnt/c/Users/user/Documents/code/stoptracking/playbook/.mitogen/mitogen-0.2.9/mitogen/service.py", line 307, in invoke

response = self._invoke(method_name, kwargs, msg)


 "/mnt/c/Users/user/Documents/code/stoptracking/playbook/.mitogen/mitogen-0.2.9/mitogen/service.py", line 293, in _invoke

ret = method(**kwargs)


 "/mnt/c/Users/user/Documents/code/stoptracking/playbook/.mitogen/mitogen-0.2.9/ansible_mitogen/services.py", line 186, in reset

mitogen.core.listen(context, 'disconnect', l.put)


 "/mnt/c/Users/user/Documents/code/stoptracking/playbook/.mitogen/mitogen-0.2.9/mitogen/core.py", line 431, in listen

_signals(obj, name).append(func)


 "/mnt/c/Users/user/Documents/code/stoptracking/playbook/.mitogen/mitogen-0.2.9/mitogen/core.py", line 421, in _signals

obj.__dict__
AttributeError: 'NoneType' object has no attribute '__dict__'

Traceback (most recent call last):


 "<stdin>", line 1, in <module>


 "PYTHON_INSTALLATION/lib/python3.7/site-packages/dm_control/viewer/__init__.py", line 22, in <module>

from dm_control.viewer import application


 "PYTHON_INSTALLATION/lib/python3.7/site-packages/dm_control/viewer/application.py", line 23, in <module>

from dm_control import render


 "PYTHON_INSTALLATION/lib/python3.7/site-packages/dm_control/render/__init__.py", line 62, in <module>

Renderer = import_func()


 "PYTHON_INSTALLATION/lib/python3.7/site-packages/dm_control/render/__init__.py", line 38, in _import_osmesa

from dm_control.render.pyopengl.osmesa_renderer import OSMesaContext


 "PYTHON_INSTALLATION/lib/python3.7/site-packages/dm_control/render/pyopengl/osmesa_renderer.py", line 41, in <module>

from OpenGL import GL


 "PYTHON_INSTALLATION/lib/python3.7/site-packages/OpenGL/GL/__init__.py", line 4, in <module>

from OpenGL.GL.VERSION.GL_1_1 import *


 "PYTHON_INSTALLATION/lib/python3.7/site-packages/OpenGL/GL/VERSION/GL_1_1.py", line 14, in <module>

from OpenGL.raw.GL.VERSION.GL_1_1 import *


 "PYTHON_INSTALLATION/lib/python3.7/site-packages/OpenGL/raw/GL/VERSION/GL_1_1.py", line 7, in <module>

from OpenGL.raw.GL import _errors


 "PYTHON_INSTALLATION/lib/python3.7/site-packages/OpenGL/raw/GL/_errors.py", line 4, in <module>

_error_checker = _ErrorChecker( _p, _p.GL.glGetError )


 "PYTHON_INSTALLATION/lib/python3.7/ctypes/__init__.py", line 369, in __getattr__

func = self.__getitem__(name)


 "PYTHON_INSTALLATION/lib/python3.7/ctypes/__init__.py", line 374, in __getitem__

func = self._FuncPtr((name_or_ordinal, self))
AttributeError: /usr/lib/libOSMesa.so.8: undefined symbol: glGetError
