Maintenance Tool fails to update Qt on Windows

It's been several Qt 5.x versions now that I have to completely reinstall Qt each time I want to get a newer version. Past years, it has failed once a year to update, but now it fails most of the times in the middle of the installation.

Last error is a new one : I cannot add/delete a module. The tool downloads a three part metadata and finally fails with this error message :

Cannot find missing dependency «qt.qt5.5130.doc.qtcharts » for « qt.qt5.5130.qtcharts ».

I've not seen this kind of error before. I'd like this issue to be more about a generally failing maintenance tool on Windows 7 than this single error, if possible.

With this error, if you click OK, a list of installed components is displayed. No new component can be installed as they are not listed.