I would like to upgrade yt to the latest version, I tried typing yt update in a folder on cluster /work/03858/thaque56/sw/yt-3.1 and it gives me following error:

Traceback (most recent call last):
  File "/work/03858/thaque56/sw/yt-3.1/yt-x86_64/bin/yt", line 9, in <module>
    load_entry_point('yt==3.2.3', 'console_scripts', 'yt')()
  File "build/bdist.linux-x86_64/egg/pkg_resources/__init__.py", line 558, in load_entry_point
   
  File "build/bdist.linux-x86_64/egg/pkg_resources/__init__.py", line 2682, in load_entry_point
   
  File "build/bdist.linux-x86_64/egg/pkg_resources/__init__.py", line 2355, in load
   
  File "build/bdist.linux-x86_64/egg/pkg_resources/__init__.py", line 2361, in resolve
   
  File "/work/03858/thaque56/sw/yt-3.1/yt-x86_64/src/yt-hg/yt/__init__.py", line 123, in <module>
    from yt.data_objects.api import \
  File "/work/03858/thaque56/sw/yt-3.1/yt-x86_64/src/yt-hg/yt/data_objects/api.py", line 16, in <module>
    from .grid_patch import \
  File "/work/03858/thaque56/sw/yt-3.1/yt-x86_64/src/yt-hg/yt/data_objects/grid_patch.py", line 19, in <module>
    from yt.data_objects.data_containers import \
  File "/work/03858/thaque56/sw/yt-3.1/yt-x86_64/src/yt-hg/yt/data_objects/data_containers.py", line 55, in <module>
    from yt.utilities.parallel_tools.parallel_analysis_interface import \
  File "/work/03858/thaque56/sw/yt-3.1/yt-x86_64/src/yt-hg/yt/utilities/parallel_tools/parallel_analysis_interface.py", line 33, in <module>
    from yt.utilities.lib.quad_tree import \
ImportError: No module named quad_tree