QFileDialog::getExistingDirectory() errors if Windows username is non-ASCII

Steps to replicate:

1) Create a new user with a non-ASCII username in Windows 10

2) Create basic Qt demo application

3) Insert QFileDialog::getExistingDirectory(nullptr, "Where do you want to save the package?", "Where do you want to save the package?");

Observe errors when you launch the application in Debug mode. Release mode does not have them.