I'm also having the same problem, I didn't find the solution on the forumby gilvanio - How to...
I have a load balance configuration with 4 OpenVPN servers with UDP protocol, but it does not connect to the servers, follows log messages 2020/03/12 16:11:15 6272#0: *97 upstream timed out (110: Connection timed out) while proxying connection, udp client: 3.xxx.xxx.139, server: 0.0.0.0:1194, upstream: "192.168.111.21:1194", bytes from/to client:197/0, bytes from/to upstream:0/197by gilvanio - How to...