I had almost the same. I got the "Loading" box forever after logging in.
Clearing the browser cache completely resolved it for me.
I suspect there was stale content left in there from the previous version of phpVirtualBox.
Last edit: Kender 2014-02-11
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Arch linux, vbox 4.3.6 and latest phpvirtualbox.
I only get a blank webpage when I point my browser at the ip address.
I had almost the same. I got the "Loading" box forever after logging in.
Clearing the browser cache completely resolved it for me.
I suspect there was stale content left in there from the previous version of phpVirtualBox.
Last edit: Kender 2014-02-11
There were no previous phpvirtualbox versions. I have never used it before.