@shibli what type of switch do you have?

@shibli probably faulty cable or connectors. what happened if you manually lock switch port to 1000Mbps?

@JKMckinneyTX run nssm install Omada then and install service

@rJames23 try and downgrade to 2.1.4, there were some issues with 2.2.0 and it was withdrawn https://community.tp-link.com/en/business/forum/topic/615998

@dekra cipher AES-256-GCM is not supported by tp-link, ref. this tread. https://community.tp-link.com/en/business/forum/topic/616602?replyId=1231612 actually tp-link only supports old OpenVPN version...

@Clive_A Same problem, try to connect to a Unifi UXG-Pro. Have tried with openvpn client on ER605v2, ER707-M2 and ER8411 with no sucsess. If I try OpenVPN Client on UXG-Pro to TP-Link SSL-VPN or...