R6400v2 OpenSSL VPN Error Ubuntu

Hi everyone,

i have activated the VPN option on my router and then tried to test it if it works.

I use the 22.04 Ubuntu Distribution with all updates up to date.

When i want to connect to my VPN I'm receiving the following errors:

OpenSSL: error:0A0C0103:SSL routines::internal error
TLS_ERROR: BIO read tls_read_plaintext error
TLS Error: TLS object -> incoming plaintext read error
TLS Error: TLS handshake failed

the errors are copied from the linux sys log file.

and this is my client config file:

client
dev tap
proto udp
remote my.ip.my.ip 12974
resolv-retry infinite
nobind
persist-key
persist-tun
ca ca.crt
cert client.crt
key client.key
cipher AES-128-CBC
comp-lzo
verb 5

every hint will be very appreciated 🙂

Thanks!