At first, it stucked at "Connecting" forever and I can't see my other networks. I tried to fix that by following a guide from alexeev in this post https://radmin-club.com/radmin-vpn/radmin-vpn-connect-problem/. But then, my IP address didn't show anymore, the line "Connecting" turned into "Redirecting".
I've tried to reinstall Radmin VPN for a few times and the problem is still there. I've also disabled my firewall and my antivirus as well.
Open Windows command line (press Win + R) and type
cmd
and press enter.
Type
Ping 51.89.192.55
Ping 51.89.173.95
Ping 147.135.70.219
wait till the end of each command, make a screenshot and send it.