What does this log means?

[1yzz]

2019/06/21 11:27:54 level 0 action round trip failed addr [::1]:38292 host localhost:8080 url / err client not subscribed
2019/06/21 11:28:11 level 0 action round trip failed addr [::1]:38298 host localhost:8080 url / err client not subscribed
2019/06/21 11:46:15 level 0 action round trip failed addr 128.204.170.120:35425 host 104.194.83.48:8080 url / err client not subscribed
2019/06/21 11:46:38 level 0 action round trip failed addr 188.255.246.193:55233 host 104.194.83.48:8080 url / err client not subscribed
2019/06/21 12:06:19 level 0 action round trip failed addr 79.142.215.207:40519 host 104.194.83.48:8080 url / err client not subscribed
2019/06/21 13:00:27 level 0 action round trip failed addr 79.107.136.147:39621 host 104.194.83.48:8080 url / err client not subscribed
2019/06/21 15:28:30 level 0 action round trip failed addr 109.175.7.6:39367 host 104.194.83.48:8080 url / err client not subscribed
2019/06/21 15:31:20 level 0 action round trip failed addr 5.190.176.90:57374 host 104.194.83.48:8080 url / err client not subscribed

[bmcgonag]

@1yzz It appears your endpoint isn't able to be reached. You may have a NAT issue, or may need to forward port 8080 properly through your network.