Christian Butcher and Steve Watts have reported that this is an issue they have seen. To replicate, import the OVA and follow the standard instructions for activating LV Community edition. Firefox is happy to help, but after the log in, it seems like the page freezes whilst communicating with NI.com. However, when you close Firefox, LabVIEW has activated just fine. It could be related the issue #6 report by @enoearias . This needs further investigation.