The VPN is the University's Virtual Private Network, which allows remote access to UEA systems.
You can familiarise yourself with how to access the VPN from the VPN Page
There is a knowledge based entry from the manufacture of the VPN available at https://my.f5.com/manage/s/article/K10445740 that has fixed this issue for other users.
Scroll down to the 'Recommended Actions' sections and carry out the steps under the following subsections:
If you are struggling to get the VPN working on Windows please see the VPN Handy Hints Guide below :-
handy_hint_guide_-vpn-_sep_2020.pdf
If you have installed the VPN using the Windows Store "F5 Access" app but you recieve this error
“The Remote Access Service IP configuration is unusable”
This link should provide the fix - https://www.itexperience.net/vpn-the-remote-access-service-ip-configuration-is-unusable/