ImportError: libGL.so.1: cannot open shared object file: No such file or directory

[ch3njust1n]

Traceback (most recent call last):
  File "./smpl.py", line 13, in <module>
    from distributed.parameter_server import ParameterServer
  File "/home/ubuntu/smpl/distributed/parameter_server.py", line 21, in <module>
    import os, torch, ujson, redis, socket, logging, utils, test, train, data
  File "data/data.py", line 6, in <module>
    import matplotlib.pyplot as plt
  File "/home/ubuntu/anaconda2/envs/smpl/lib/python2.7/site-packages/matplotlib/pyplot.py", line 115, in <module>
    _backend_mod, new_figure_manager, draw_if_interactive, _show = pylab_setup()
  File "/home/ubuntu/anaconda2/envs/smpl/lib/python2.7/site-packages/matplotlib/backends/__init__.py", line 32, in pylab_setup
    globals(),locals(),[backend_name],0)
  File "/home/ubuntu/anaconda2/envs/smpl/lib/python2.7/site-packages/matplotlib/backends/backend_qt5agg.py", line 16, in <module>
    from .backend_qt5 import QtCore
  File "/home/ubuntu/anaconda2/envs/smpl/lib/python2.7/site-packages/matplotlib/backends/backend_qt5.py", line 26, in <module>
    import matplotlib.backends.qt_editor.figureoptions as figureoptions
  File "/home/ubuntu/anaconda2/envs/smpl/lib/python2.7/site-packages/matplotlib/backends/qt_editor/figureoptions.py", line 20, in <module>
    import matplotlib.backends.qt_editor.formlayout as formlayout
  File "/home/ubuntu/anaconda2/envs/smpl/lib/python2.7/site-packages/matplotlib/backends/qt_editor/formlayout.py", line 56, in <module>
    from matplotlib.backends.qt_compat import QtGui, QtWidgets, QtCore
  File "/home/ubuntu/anaconda2/envs/smpl/lib/python2.7/site-packages/matplotlib/backends/qt_compat.py", line 128, in <module>
    from PyQt5 import QtCore, QtGui, QtWidgets
ImportError: libGL.so.1: cannot open shared object file: No such file or directory