Maintenance Tool Installer Error - QmakeOutputInstallerKey

With a clean install of Windows 10, I began downloading various Qt Open Source components with the online installer. I downloaded components in batches because doing them all at once usually causes the tool to give up in the middle of the download (I have 150KiB/s download here). This is the order of the batches:

+ Qt Creator and MinGW 4.9.2
+ Qt 5.5 MinGW 4.9.2 32bit
+ Qt 5.5 Android armv7
+ Qt 5.5 Quick Controls

During the final batch of Qt Quick Controls, the error in the attached image is thrown immediately after the download completes. Retry does nothing, and hitting ignore once will trigger the error again after a little more installation occurs at "Installing component Qt Quick Controls for MinGW 4.9.2 32-bit". Then it finishes after ignoring again.

There don't appear to be any negative side effects since I am able to create a basic Qt Quick Controls 1.3 application and run it just fine.