Hello
If you already restarted computer, home router, removed VPN, Added again and all the settings are absolutely right. Just a couple more things:
1st) Internet Speed on the user's network
2nd) Go to the computer device settings and delete all WAN miniports. Then search hardware and they will all come up again. This usually works. A small number of times I had to redo the VPN after this.
Lastly, no changes on the AV/Firewall? I also found a few times on personal devices AV/Firewall solutions that completely block the VPN.
Hope any of these helps