It's quite possible that it conflicted with your initial setup. You could attempt to run the ArubaCloud OS installer once more and start from fresh. That would ultimately be the best way, without killing yourself over trying to resolve it, to go about this... however, I assume the install of your server is relatively fresh.
If you would like to try to do a reinstall of QuickBox first, just to make sure.
Do the following:
apt-get purge -y apache2*
rm -rf QuickBox
git clone --recursive https://lab.quickbox.io/QuickBox/QuickBox /root/QuickBox &&