First thing is that there are two passwords - one for wifi devices and one for accessing the Hub settings - make sure you are using the correct one.
If not, do a factory reset - this way.
With the Hub "on" push in the pin on the back/side/bottom of the Hub with the end of a paperclip until you feel it at the “stop point” and hold it there for a "timed" 60 seconds do NOT restart the Hub after that. Leave it 5' or so to stabilise and then your passwords/passphrase for both the Hub settings and the Wifi networks will revert to the two printed on the Hub sticker on its base/side/card
--------------------
John
--------------------
I do not work for VM. My services: HD TV on VIP (+ Sky Sports & Movies & BT sport), x3 V6 boxes (1 wired, 2 on WiFi) Hub5 in modem mode with Apple Airport Extreme Router +2 Airport Express's & TP-Link Archer C64 WAP. On Volt 350Mbps, Talk Anytime Phone, x2 Mobile SIM only iPhones.