MINGW-packages: qtwebkit broken after qt5 update (bad icu version)

After recompiling my Qt5 app with qt5-5.13.2-1, I am getting the following error box:

This application failed to start because no Qt platform plugin could be initialized.
Reinstalling the application may fix this problem.
Available platform plugins are: direc2d, minimal, offscreen, webgl, windows.

Other qt applications (such as qtcore and linguist) seems to work fine.

When opening my app in dependency walker, I see that Qt5Core.dll, Qt5Gui.dll, Qt5Widgets.dll and Qt5PrintSupport.dll appear in read (broken).

Also, the version of my app installed outside the MSYS2 environment seems to be broken as well… Similarly the linguist version that is bundled with my app is also broken the same way. That shouldn’t happen… I am wondering if Qt is writing something in the Windows registry or global configuration file that I should reset to fix it.