Traceback (most recent call last):
  File "/Applications/ChimeraX-1.6.app/Contents/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/chimerax/core/triggerset.py", line 138, in invoke
    return self._func(self._name, data)
  File "/Users/tmckeithan/Library/Application Support/ChimeraX/1.6/site-packages/chimerax/isolde/tool.py", line 42, in _launch_main_gui
    tw = self.tool_window = IsoldeMainWin(self)
  File "/Users/tmckeithan/Library/Application Support/ChimeraX/1.6/site-packages/chimerax/isolde/ui/main_win.py", line 54, in __init__
    self.general_tab = GeneralTab(self.session, self.isolde, self, tabw)
  File "/Users/tmckeithan/Library/Application Support/ChimeraX/1.6/site-packages/chimerax/isolde/ui/ui_base.py", line 226, in __init__
    self.populate()
  File "/Users/tmckeithan/Library/Application Support/ChimeraX/1.6/site-packages/chimerax/isolde/ui/general_tab/__init__.py", line 26, in populate
    self.addWidget(ComputationalPlatformPanel(session, isolde, parent, gui))
  File "/Users/tmckeithan/Library/Application Support/ChimeraX/1.6/site-packages/chimerax/isolde/ui/general_tab/platform.py", line 14, in __init__
    cpd = self.content = ComputationalPlatformDialog(session, isolde, gui, self)
  File "/Users/tmckeithan/Library/Application Support/ChimeraX/1.6/site-packages/chimerax/isolde/ui/general_tab/platform.py", line 26, in __init__
    self._populate_platform_combo_box()
  File "/Users/tmckeithan/Library/Application Support/ChimeraX/1.6/site-packages/chimerax/isolde/ui/general_tab/platform.py", line 36, in _populate_platform_combo_box
    platform_names = list(sorted(platform_names, key=lambda p:sim_params.platforms.index(p)))
  File "/Users/tmckeithan/Library/Application Support/ChimeraX/1.6/site-packages/chimerax/isolde/ui/general_tab/platform.py", line 36, in <lambda>
    platform_names = list(sorted(platform_names, key=lambda p:sim_params.platforms.index(p)))
ValueError: tuple.index(x): x not in tuple

Error processing trigger "new frame":
ValueError: tuple.index(x): x not in tuple

File "/Users/tmckeithan/Library/Application Support/ChimeraX/1.6/site-packages/chimerax/isolde/ui/general_tab/platform.py", line 36, in
platform_names = list(sorted(platform_names, key=lambda p:sim_params.platforms.index(p)))

See log for complete Python traceback.