Can not import some qml example with Qt Creator

Reproduction steps:
1. Start Qt Creator.
2. Click Welcome button on the left bar.
3. Check "Show Example and Demos", then click "Tag Filter" button.
4. There are some many tags. Find qml tag and click it. See tag.png.
5. Select an example, e.g. Clock. Pop up a dialog see dialog.png.
6. Click "Browse" button to select a directory that is writable.
7. Click "Keep Project and Open" button, only the dialog close, no other
response.
8. Click "Copy Project and Open", pop up a dialog named "Can not copy
project". See copy.png.
9. So there is no way to import the example. Other examples are
"Corkboards", "Dail", "Dynamic Scene" and some other in the qml tag.