Standalone server connection problem

[tdafos]

Hello

I am trying to install openvpn-ui on an existing openvpn server with clients running on an ubuntu 20.04 server. I installed openvpn-ui using the standalone-install.sh script. Everything went fine.
When I run the server it does not connect to the openvpn server. On the command line I often get this warning:

2024/10/26 20:20:13.408 [E] [default.go:42] dial tcp: lookup openvpn on 127.0.0.53:53: server misbehaving

I don't know where it gets the address. I think it should be 127.0.0.1:53 instead. Does anyone know how can I fix it?

Thank you