Open VPN client error "TLS Error: TLS key negotiation failed"

Got a couple clients where OpenVPN is not working. One is a first time VPN setup, the other one has existing VPN that had worked in the past but stopped working a few days ago. Both are Windows 10 clients with the latest OpenVPN 2.5 community VPN client. Both are Balance 20 routers with latest 8.1 firmware.

The client will not connect. I’m setup with split tunnel. I get a 60 second time out. I’ve tried on both port 1194 (default) and switching to 443. Same results. Any ideas?