Couldn't verify username because servers are unavailable
[18:12:01 INFO]: com.mojang.authlib.GameProfile@xxxxxxxx[id=,name=xxxxxxxxx,properties={},legacy=false] (/172.17.0.1:52742) lost connection: Authentication servers are down. Please try again later, sorry!
It says right there that, the login servers are unreachable. Check your network configuration and ensure that the Mojang servers are reachable for your server.
What behaviour is expected:
Couldn't verify username because servers are unavailable
[18:12:01 INFO]: com.mojang.authlib.GameProfile@xxxxxxxx[id=,name=xxxxxxxxx,properties={},legacy=false] (/172.17.0.1:52742) lost connection: Authentication servers are down. Please try again later, sorry!
Plugin list:
Dynmap
Paper build number:
1.14.3 build 122