Mango Problem

Everything worked fine for my openvpn for Helium Miner fixing the relay.
And last night this happened.
I have 3 mangos working form one network 2 of them have this problem and one works fine

Can I ask

  1. Firmware version
  2. Is the Internet works OK without VPN?
  3. Most people use Wireguard. What is reason you use openvpn?