@Jun-CH Can you translate the text in the message box?
You can also check Windows event log for more information.
And try to disable anti virus software.
@jsulm
The configuration repository will also crash,
I have set other source addresses in QT5.15
Is there an old configuration file that is incompatible with MaintenanceTool.exe 4.2.0.0?
I use the earlier program qt-unified-windows-x86-3.2.3-online.exe and the situation is the same
Modify repository: crash
Expand the component tree: crash