SystemError: <built-in function connectSlotsByName> returned a result with an error set -- (py)qt-5.13

Hello!

Apparemment, le simulateur de marche plus avec (py)qt5-5.13

$ ./actuasim.py 
saved_rooms.json not found
Error loading saved_rooms.json... Load a default rooms template
AttributeError: __getattribute__

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "./actuasim.py", line 240, in <module>
    actuasim.load_room_template()
  File "./actuasim.py", line 149, in load_room_template
    self.load_rooms(template)
  File "./actuasim.py", line 75, in load_rooms
    room = Room.from_dict(title=key, room_dict=val)
  File "/home/marcoep/data/nextcloud/switch_edu-id/Institution/HEPIA/labo/IoT-Master-Module/code.nosync/actuasim_iot/actuasim/room.py", line 66, in from_dict
    value))
  File "/home/marcoep/data/nextcloud/switch_edu-id/Institution/HEPIA/labo/IoT-Master-Module/code.nosync/actuasim_iot/actuasim/blind.py", line 27, in __init__
    self.ui.setupUi(self)
  File "/home/marcoep/data/nextcloud/switch_edu-id/Institution/HEPIA/labo/IoT-Master-Module/code.nosync/actuasim_iot/actuasim/ui_blind.py", line 48, in setupUi
    QtCore.QMetaObject.connectSlotsByName(Blind)
SystemError: <built-in function connectSlotsByName> returned a result with an error set

Sur Arch Linux, j'ai installé:

# pacman -Qs qt5
local/pyqt5-common 5.13.0-1
    Common PyQt files shared between python-pyqt5 and python2-pyqt5
local/python-pyqt5 5.13.0-1
    A set of Python 3.x bindings for the Qt5 toolkit
local/python-qtpy 1.8.0-1
    Provides an uniform layer to support PyQt5, PyQt4 and PySide with a single codebase
local/python-sip-pyqt5 4.19.18-1
    Python 3.x SIP bindings for C and C++ libraries (PyQt5 version)
local/qt5-base 5.13.0-7 (qt qt5)
    A cross-platform application and UI framework
local/qt5-declarative 5.13.0-1 (qt qt5)
    Classes for QML and JavaScript languages
local/qt5-location 5.13.0-1 (qt qt5)
    Provides access to position, satellite and area monitoring classes
local/qt5-svg 5.13.0-1 (qt qt5)
    Classes for displaying the contents of SVG files
local/qt5-tools 5.13.0-2 (qt qt5)
    A cross-platform application and UI framework (Development Tools, QtHelp)
local/qt5-webchannel 5.13.0-1 (qt qt5)
    Provides access to QObject or QML objects from HTML clients for seamless integration of Qt applications with HTML/JavaScript clients
local/qt5-webengine 5.13.0-4 (qt qt5)
    Provides support for web applications using the Chromium browser project

Bug similaire déjà relevé dans une autre application.