VPN Nighthawk AX5 RAX30 not connecting - once more

There's a solution in the community that doesn't work for me, even though I deleted the dev-node line. The error message remains the same. Last year, the VPN connection worked. Version V1.0.13.102, Android 14-11

"client
dev tun
proto udp
remote CSischka 12973
resolv-retry infinite
nobind
persist-key
persist-tun ...."