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.

Qt Code: 
  1. pygame 1.9.4.post1
  2. Hello from the pygame community. https://www.pygame.org/contribute.html
  3. qt5ct: using qt5ct plugin
  4. Traceback (most recent call last):
  5.   File "./ooeygui.py", line 4026, in <module>
  6.     gui = Main()
  7.   File "./ooeygui.py", line 376, in __init__
  8.     self.ui = uic.loadUi(LOCAL_DIR + "ooeygui.ui", self)
  9.   File "/usr/local/lib/python3.7/dist-packages/PyQt5/uic/__init__.py", line 238, in loadUi
  10.     return DynamicUILoader(package).loadUi(uifile, baseinstance, resource_suffix)
  11.   File "/usr/local/lib/python3.7/dist-packages/PyQt5/uic/Loader/loader.py", line 66, in loadUi
  12.     return self.parse(filename, resource_suffix)
  13.   File "/usr/local/lib/python3.7/dist-packages/PyQt5/uic/uiparser.py", line 1037, in parse
  14.     actor(elem)
  15.   File "/usr/local/lib/python3.7/dist-packages/PyQt5/uic/uiparser.py", line 828, in createUserInterface
  16.     self.traverseWidgetTree(elem)
  17.   File "/usr/local/lib/python3.7/dist-packages/PyQt5/uic/uiparser.py", line 806, in traverseWidgetTree
  18.     handler(self, child)
  19.   File "/usr/local/lib/python3.7/dist-packages/PyQt5/uic/uiparser.py", line 273, in createWidget
  20.     self.traverseWidgetTree(elem)
  21.   File "/usr/local/lib/python3.7/dist-packages/PyQt5/uic/uiparser.py", line 806, in traverseWidgetTree
  22.     handler(self, child)
  23.   File "/usr/local/lib/python3.7/dist-packages/PyQt5/uic/uiparser.py", line 503, in createLayout
  24.     self.traverseWidgetTree(elem)
  25.   File "/usr/local/lib/python3.7/dist-packages/PyQt5/uic/uiparser.py", line 806, in traverseWidgetTree
  26.     handler(self, child)
  27.   File "/usr/local/lib/python3.7/dist-packages/PyQt5/uic/uiparser.py", line 546, in handleItem
  28.     self.traverseWidgetTree(elem)
  29.   File "/usr/local/lib/python3.7/dist-packages/PyQt5/uic/uiparser.py", line 806, in traverseWidgetTree
  30.     handler(self, child)
  31.   File "/usr/local/lib/python3.7/dist-packages/PyQt5/uic/uiparser.py", line 273, in createWidget
  32.     self.traverseWidgetTree(elem)
  33.   File "/usr/local/lib/python3.7/dist-packages/PyQt5/uic/uiparser.py", line 806, in traverseWidgetTree
  34.     handler(self, child)
  35.   File "/usr/local/lib/python3.7/dist-packages/PyQt5/uic/uiparser.py", line 273, in createWidget
  36.     self.traverseWidgetTree(elem)
  37.   File "/usr/local/lib/python3.7/dist-packages/PyQt5/uic/uiparser.py", line 806, in traverseWidgetTree
  38.     handler(self, child)
  39.   File "/usr/local/lib/python3.7/dist-packages/PyQt5/uic/uiparser.py", line 503, in createLayout
  40.     self.traverseWidgetTree(elem)
  41.   File "/usr/local/lib/python3.7/dist-packages/PyQt5/uic/uiparser.py", line 806, in traverseWidgetTree
  42.     handler(self, child)
  43.   File "/usr/local/lib/python3.7/dist-packages/PyQt5/uic/uiparser.py", line 546, in handleItem
  44.     self.traverseWidgetTree(elem)
  45.   File "/usr/local/lib/python3.7/dist-packages/PyQt5/uic/uiparser.py", line 806, in traverseWidgetTree
  46.     handler(self, child)
  47.   File "/usr/local/lib/python3.7/dist-packages/PyQt5/uic/uiparser.py", line 273, in createWidget
  48.     self.traverseWidgetTree(elem)
  49.   File "/usr/local/lib/python3.7/dist-packages/PyQt5/uic/uiparser.py", line 806, in traverseWidgetTree
  50.     handler(self, child)
  51.   File "/usr/local/lib/python3.7/dist-packages/PyQt5/uic/uiparser.py", line 503, in createLayout
  52.     self.traverseWidgetTree(elem)
  53.   File "/usr/local/lib/python3.7/dist-packages/PyQt5/uic/uiparser.py", line 806, in traverseWidgetTree
  54.     handler(self, child)
  55.   File "/usr/local/lib/python3.7/dist-packages/PyQt5/uic/uiparser.py", line 546, in handleItem
  56.     self.traverseWidgetTree(elem)
  57.   File "/usr/local/lib/python3.7/dist-packages/PyQt5/uic/uiparser.py", line 806, in traverseWidgetTree
  58.     handler(self, child)
  59.   File "/usr/local/lib/python3.7/dist-packages/PyQt5/uic/uiparser.py", line 264, in createWidget
  60.     self.stack.push(self.setupObject(widget_class, parent, elem))
  61.   File "/usr/local/lib/python3.7/dist-packages/PyQt5/uic/uiparser.py", line 230, in setupObject
  62.     self.wprops.setProperties(obj, branch)
  63.   File "/usr/local/lib/python3.7/dist-packages/PyQt5/uic/properties.py", line 415, in setProperties
  64.     prop_value = self.convert(prop, widget)
  65.   File "/usr/local/lib/python3.7/dist-packages/PyQt5/uic/properties.py", line 378, in convert
  66.     return func(prop[0], **args)
  67.   File "/usr/local/lib/python3.7/dist-packages/PyQt5/uic/properties.py", line 292, in _palette
  68.     role = getattr(QtGui.QPalette, color.get('role'))
  69. AttributeError: type object 'QPalette' has no attribute 'PlaceholderText'
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