GUI load just doesn't work at all

[willkill07]

/Users/wkillian/Desktop/cool.monty
Exception in Tkinter callback
Traceback (most recent call last):
  File "/usr/local/Cellar/python@3.9/3.9.2_1/Frameworks/Python.framework/Versions/3.9/lib/python3.9/tkinter/__init__.py", line 1892, in __call__
    return self.func(*args)
  File "/Users/wkillian/Desktop/420/MontyPython/GUIMenuBar.py", line 13, in <lambda>
    file.add_command(label="Open", command= lambda: controller.windowFactory("Open"))
  File "/Users/wkillian/Desktop/420/MontyPython/GUIController.py", line 427, in windowFactory
    box = windows[windowType](windowType, errorMsg, self)
  File "/Users/wkillian/Desktop/420/MontyPython/PopupBoxes.py", line 70, in __init__
    controller.load(filename)
  File "/Users/wkillian/Desktop/420/MontyPython/GUIController.py", line 28, in load
    Interface.loadFile(self.model, name, "GUI", self.view)
  File "/Users/wkillian/Desktop/420/MontyPython/Interface.py", line 299, in loadFile
    mainWindow.lineDict[classes] = value
TypeError: unhashable type: 'list'

Primary: @qlehman
Secondary:
Size: Medium
Actual Size: Medium
Actual Time: 2 hours