Traceback (most recent call last):
  File "/Applications/ChimeraX_Daily.app/Contents/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/chimerax/ui/gui.py", line 886, in <lambda>
    close_action.triggered.connect(lambda arg, s=self, sess=session: s.file_close_cb(sess))
  File "/Applications/ChimeraX_Daily.app/Contents/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/chimerax/ui/gui.py", line 616, in file_close_cb
    run(session, 'close session')
  File "/Applications/ChimeraX_Daily.app/Contents/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/chimerax/core/commands/run.py", line 31, in run
    results = command.run(text, log=log)
  File "/Applications/ChimeraX_Daily.app/Contents/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/chimerax/core/commands/cli.py", line 2837, in run
    result = ci.function(session, **kw_args)
  File "/Applications/ChimeraX_Daily.app/Contents/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/chimerax/std_commands/close.py", line 60, in close_session
    session.reset()
  File "/Applications/ChimeraX_Daily.app/Contents/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/chimerax/core/session.py", line 466, in reset
    sm.reset_state(container, self)
  File "/Applications/ChimeraX_Daily.app/Contents/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/chimerax/core/models.py", line 443, in reset_state
    self.close([m for m in self.list() if not m.SESSION_ENDURING])
  File "/Applications/ChimeraX_Daily.app/Contents/Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/chimerax/core/models.py", line 622, in close
    m.delete()
  File "/Users/oldimac/Library/Application Support/ChimeraX/0.91/site-packages/chimerax/clipper/symmetry.py", line 825, in delete
    if self._update_handler is not None:
AttributeError: 'SymmetryManager' object has no attribute '_update_handler'

AttributeError: 'SymmetryManager' object has no attribute '_update_handler'

File "/Users/oldimac/Library/Application Support/ChimeraX/0.91/site-packages/chimerax/clipper/symmetry.py", line 825, in delete
if self._update_handler is not None: