From what I’ve read, and there’s a YouTube video out there as well (I’ll try and find the link), it’s the latest versions of the App that have implemented the VPN hack block.
Rolling back to an earlier version of the App still works apparently, but it could be that Unno have implemented a custom firmware or even been sent Avinox units configured differently, some kind of ‘customer tune’?
EDIT:
He talks about the region issue he’d been having, he mentions having to scroll down to the ‘Erase All Data’ section on the bike control menus, and then it worked.