Hello,
OpenVPN configuration examples are available on our wiki page here. I suggest configuring VPN according to the instructions on that page.
If the issue persists, could you please attach a troubleshoot file from RUT and, if possible, logs from the OpenVPN server?
The troubleshoot file can be downloaded from System -> Administration -> Troubleshoot. Attach files by editing your question. The attached files are only visible to Teltonika moderators.
Kind Regards,
Andzej