Qt6 migration - UIC generated code fails to compile (connect slots) - updated - qt

Question

I'm trying to port my project from Qt5 to Qt6.
My problem is that UIC generated code looks like this:
QObject::connect(SelectHome, &QToolButton::clicked, toQPSQLSettingUI, qOverload<>(&QWidget::selectHome));
MSVC2019 compilations fails with:
ui_toqpsqlsettingui.h(74,101): error C2039: 'selectHome': is not a member of 'QWidget'
C:\Qt\6.0.4\msvc2019_64\include\QtWidgets\qcompleter.h(57): message : see declaration of 'QWidget'
C:\Users\I542264\source\repos\tora\src\ui_toqpsqlsettingui.h(74,1): error C2065: 'selectHome': undeclared identifier
See the target is method is QWidget::selectHome, so IMHO MSVC is right: QWidget does not have method selectHome. But target should be sub-class method toQPSQLSettingUI::selectHome
Complete source is here. Initially created for Qt2, migrated to Qt3=>Qt4=>Q5.
<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0">
<class>toQPSQLSettingUI</class>
<widget class="QWidget" name="toQPSQLSettingUI">
<property name="geometry">
<rect>
<x>0</x>
<y>0</y>
<width>600</width>
<height>517</height>
</rect>
</property>
<property name="sizePolicy">
<sizepolicy hsizetype="Expanding" vsizetype="Preferred">
<horstretch>0</horstretch>
<verstretch>0</verstretch>
</sizepolicy>
</property>
<property name="minimumSize">
<size>
<width>600</width>
<height>0</height>
</size>
</property>
<property name="windowTitle">
<string>Form1</string>
</property>
<layout class="QGridLayout">
<property name="margin">
<number>11</number>
</property>
<property name="spacing">
<number>6</number>
</property>
<item row="0" column="1" colspan="2">
<widget class="QLineEdit" name="PGSQL_HOME"/>
</item>
<item row="0" column="0">
<widget class="QLabel" name="TextLabel6_2_2_2">
<property name="toolTip">
<string>The default dateformat to use when querying the database.</string>
</property>
<property name="text">
<string>PgSQL home</string>
</property>
<property name="wordWrap">
<bool>false</bool>
</property>
<property name="buddy">
<cstring>PGSQL_HOME</cstring>
</property>
</widget>
</item>
<item row="1" column="0">
<spacer name="verticalSpacer">
<property name="orientation">
<enum>Qt::Vertical</enum>
</property>
<property name="sizeHint" stdset="0">
<size>
<width>20</width>
<height>40</height>
</size>
</property>
</spacer>
</item>
<item row="0" column="3">
<widget class="QToolButton" name="SelectHome">
<property name="text">
<string>...</string>
</property>
</widget>
</item>
</layout>
</widget>
<tabstops>
<tabstop>PGSQL_HOME</tabstop>
</tabstops>
<resources/>
<connections>
<connection>
<sender>SelectHome</sender>
<signal>clicked()</signal>
<receiver>toQPSQLSettingUI</receiver>
<slot>selectHome()</slot>
<hints>
<hint type="sourcelabel">
<x>606</x>
<y>20</y>
</hint>
<hint type="destinationlabel">
<x>314</x>
<y>258</y>
</hint>
</hints>
</connection>
</connections>
<slots>
<signal>signal1()</signal>
</slots>
</ui>