I got the following error report and the program asked me to report it.
I hope it could be of any help.
Great app.

Traceback

File: /usr/lib/python3.6/site-packages/gaupol/util.py
Line: 44
In: call_function

    function(*args, **kwargs)

File: /usr/lib/python3.6/site-packages/gaupol/assistants.py
Line: 1036
In: _correct_texts

    page.correct_texts(dummy, rows, doc)

File: /usr/lib/python3.6/site-packages/gaupol/assistants.py
Line: 561
In: correct_texts

    return self._show_error_dialog(str(error))

File: /usr/lib/python3.6/site-packages/gaupol/assistants.py
Line: 600
In: _show_error_dialog

    dialog = gaupol.ErrorDialog(self.get_parent(), title, message)

File: /usr/lib/python3.6/site-packages/gaupol/dialogs/message.py
Line: 37
In: init

    text=title)

File: /usr/lib64/python3.6/site-packages/gi/overrides/init.py
Line: 319
In: new_init

    return super_init_func(self, **new_kwargs)

File: /usr/lib64/python3.6/site-packages/gi/overrides/Gtk.py
Line: 575
In: init

    self._init(*args, **new_kwargs)

File: /usr/lib64/python3.6/site-packages/gi/overrides/init.py
Line: 319
In: new_init

    return super_init_func(self, **new_kwargs)

File: /usr/lib64/python3.6/site-packages/gi/overrides/Gtk.py
Line: 521
In: init

    _window_init(self, *args, **kwargs)

File: /usr/lib64/python3.6/site-packages/gi/overrides/init.py
Line: 319
In: new_init

    return super_init_func(self, **new_kwargs)

TypeError: could not convert value for property `transient_for' from Box to GtkWindow

Environment

Platform: Linux-5.3.18-lp152.50-default-x86_64-with-glibc2.3.4
Locale: en_US.utf_8

Versions

aeidon: 1.8
chardet: 3.0.4
gaupol: 1.8
gspell: 1
gstreamer: 1.16.2.0
gtk+: 3.24.20
pygobject: 3.34.0
python: 3.6.10