PyQt5 5.15.2 Raspberry Pi issues

I have followed steps to compile and deploy from source PyQt 5.15.2 to my Raspberry Pi4.

If I do issue a 'pip3 list' i do see that PyQt5 version 5.15.2 is installed.

but when I attempt to run my program I get the below issue that seems to indicate an issue with an attribute.

Please note this exact code runs with PyQt5 15.2 on Windows, Linux and MacOS.

Code:

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pygame 1.9.4.post1
Hello from the pygame community. https://www.pygame.org/contribute.html
qt5ct: using qt5ct plugin
Traceback (most recent call last):
  File "./ooeygui.py", line 4026, in <module>
    gui = Main()
  File "./ooeygui.py", line 376, in __init__
    self.ui = uic.loadUi(LOCAL_DIR + "ooeygui.ui", self)
  File "/usr/local/lib/python3.7/dist-packages/PyQt5/uic/__init__.py", line 238, in loadUi
    return DynamicUILoader(package).loadUi(uifile, baseinstance, resource_suffix)
  File "/usr/local/lib/python3.7/dist-packages/PyQt5/uic/Loader/loader.py", line 66, in loadUi
    return self.parse(filename, resource_suffix)
  File "/usr/local/lib/python3.7/dist-packages/PyQt5/uic/uiparser.py", line 1037, in parse
    actor(elem)
  File "/usr/local/lib/python3.7/dist-packages/PyQt5/uic/uiparser.py", line 828, in createUserInterface
    self.traverseWidgetTree(elem)
  File "/usr/local/lib/python3.7/dist-packages/PyQt5/uic/uiparser.py", line 806, in traverseWidgetTree
    handler(self, child)
  File "/usr/local/lib/python3.7/dist-packages/PyQt5/uic/uiparser.py", line 273, in createWidget
    self.traverseWidgetTree(elem)
  File "/usr/local/lib/python3.7/dist-packages/PyQt5/uic/uiparser.py", line 806, in traverseWidgetTree
    handler(self, child)
  File "/usr/local/lib/python3.7/dist-packages/PyQt5/uic/uiparser.py", line 503, in createLayout
    self.traverseWidgetTree(elem)
  File "/usr/local/lib/python3.7/dist-packages/PyQt5/uic/uiparser.py", line 806, in traverseWidgetTree
    handler(self, child)
  File "/usr/local/lib/python3.7/dist-packages/PyQt5/uic/uiparser.py", line 546, in handleItem
    self.traverseWidgetTree(elem)
  File "/usr/local/lib/python3.7/dist-packages/PyQt5/uic/uiparser.py", line 806, in traverseWidgetTree
    handler(self, child)
  File "/usr/local/lib/python3.7/dist-packages/PyQt5/uic/uiparser.py", line 273, in createWidget
    self.traverseWidgetTree(elem)
  File "/usr/local/lib/python3.7/dist-packages/PyQt5/uic/uiparser.py", line 806, in traverseWidgetTree
    handler(self, child)
  File "/usr/local/lib/python3.7/dist-packages/PyQt5/uic/uiparser.py", line 273, in createWidget
    self.traverseWidgetTree(elem)
  File "/usr/local/lib/python3.7/dist-packages/PyQt5/uic/uiparser.py", line 806, in traverseWidgetTree
    handler(self, child)
  File "/usr/local/lib/python3.7/dist-packages/PyQt5/uic/uiparser.py", line 503, in createLayout
    self.traverseWidgetTree(elem)
  File "/usr/local/lib/python3.7/dist-packages/PyQt5/uic/uiparser.py", line 806, in traverseWidgetTree
    handler(self, child)
  File "/usr/local/lib/python3.7/dist-packages/PyQt5/uic/uiparser.py", line 546, in handleItem
    self.traverseWidgetTree(elem)
  File "/usr/local/lib/python3.7/dist-packages/PyQt5/uic/uiparser.py", line 806, in traverseWidgetTree
    handler(self, child)
  File "/usr/local/lib/python3.7/dist-packages/PyQt5/uic/uiparser.py", line 273, in createWidget
    self.traverseWidgetTree(elem)
  File "/usr/local/lib/python3.7/dist-packages/PyQt5/uic/uiparser.py", line 806, in traverseWidgetTree
    handler(self, child)
  File "/usr/local/lib/python3.7/dist-packages/PyQt5/uic/uiparser.py", line 503, in createLayout
    self.traverseWidgetTree(elem)
  File "/usr/local/lib/python3.7/dist-packages/PyQt5/uic/uiparser.py", line 806, in traverseWidgetTree
    handler(self, child)
  File "/usr/local/lib/python3.7/dist-packages/PyQt5/uic/uiparser.py", line 546, in handleItem
    self.traverseWidgetTree(elem)
  File "/usr/local/lib/python3.7/dist-packages/PyQt5/uic/uiparser.py", line 806, in traverseWidgetTree
    handler(self, child)
  File "/usr/local/lib/python3.7/dist-packages/PyQt5/uic/uiparser.py", line 264, in createWidget
    self.stack.push(self.setupObject(widget_class, parent, elem))
  File "/usr/local/lib/python3.7/dist-packages/PyQt5/uic/uiparser.py", line 230, in setupObject
    self.wprops.setProperties(obj, branch)
  File "/usr/local/lib/python3.7/dist-packages/PyQt5/uic/properties.py", line 415, in setProperties
    prop_value = self.convert(prop, widget)
  File "/usr/local/lib/python3.7/dist-packages/PyQt5/uic/properties.py", line 378, in convert
    return func(prop[0], **args)
  File "/usr/local/lib/python3.7/dist-packages/PyQt5/uic/properties.py", line 292, in _palette
    role = getattr(QtGui.QPalette, color.get('role'))
AttributeError: type object 'QPalette' has no attribute 'PlaceholderText'

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