Hi,

Solved this issue myself but saw no mention on here.

I recently moved to a new server where I have Algo VPN but kept getting a weird error "parameter is incorrect" when connection to it.

SOLUTION:

If you install the Windows 10 ps1 file (as noted in the installation instructions) and when you try to connect is says "parameter is incorrect" then so the following:

1. Clear the Networking caches

Run windows cmd window (click windows start menu, type 'cmd', right click on 'Command Prompt' and select "Run as Administrator").

type command below
netsh int ip reset

then type
netsh int ipv6 reset

then type
netsh winsock reset

Restart your computer.

2. Reset Device Manager adaptors

   Open Device Manager
   Find Network Adapters
   Uninstall WAN Miniport drivers (IKEv2, IP, IPv6, etc)
   Click Action > Scan for hardware changes
   The adapters you just uninstalled should come back

The VPN connection then works.

Hope this helps someone.