How is a factory default reset a solution? Users could have multiple settings set up that are not factory settings. There is a bug here, or some cookie issue. I've tried clearing out caches, different browsers, even the connect app says there is another user logged in. And then if you 'try again' on the app, it reboots the hub, what a waste of time.
I know that this thread is a little long in the tooth, but I seem to have came around a fix on my Hub 3.0. Figured it would be more than helpful for people banging their heads against walls like I have been!
After messing about with all sorts of settings, I wasn't able to get anywhere. My laptop with the Same Sophos IPSEC VPN for work, always worked fine without problem over the WiFi. Its only when I tried it on my PC that it was hit and miss.
I finally came across a trend that when my PC was connecting to the 2.4GHz band on my WiFi, the VPN worked great, but when it connected to the 5Ghz band, I'd be able to connect, but no traffic would be sent through.
I disabled the 5Ghz band on my Hub 3.0, forcing my PC to connect to the 2.4Ghz band and it works without a problem!
TLDR : Either force your laptop/ PC to connect to the 2.4Ghz band of your Hub 3.0, or disable the 5Ghz (if you just want to test, or for ease of setup).