I Need Help . Not able to connect the VPN

Hello I set my VPN server and VPN client following the video linked below using flient 1 as server and beryl as travel client. It worked great for 4 months and after making an update on my vpn client to 4.6.9, I’m not able to connect the client to the server. It stays orange and the log states that Name does not resolve : [my server DDNS address]https://youtu.be/LXbDg1v65Qs?si=AwIYhTQJGcPnU29c

Please help

Please check on your VPN server that the DDNS works correctly.

Disable and Re-enable it, if it does not.

If you can't connect to your server (maybe via GoodCloud, if enabled?) you might need remote hands.