I am trying to download Qt since yesterday but it keeps on failing. It gives me a has error every few seconds which makes the download impossible. Here is the text after cancelling the download:
could not fetch archives: Could not verify Hash Error while loading http://download.qt.io/online/qtsdkrepository/windows_x86/desktop/qt5_56/qt.56.win32_msvc2015/5.6.0-1qtimageformats-Windows-Windows_10-MSVC2015-Windows-Windows_10-X86.7z?uid=....
You might be hitting a faulty mirror. You can try to change that using the QtSdkRepoChooser application