A few weeks ago we struggled with a Quickr (Domino) installation at a customer. There were some strange effects (e.g. running "qptool upgrade -a" ran for 12h; the buttons in the Quickr web UI displayed in yellow and red instead of green etc.). It took us some time to find the root cause of the issue:
The customer had Windows Server 64-bit installed (and we did not know this and did not check it...).
The statement on the system requirements page is a little bit unclear.
So just to help others to run into the same trouble: Quickr (Domino) currently is only supported with Windows Server 32-bit.