Does this help? I'm seeing it repeatedly in the log:
[20190508 21:50:11.856] TRACKER[66.165.233.194:4000, [2604:4500:9:58::10]:4000] closing connection to 66.165.233.194:4000/uTP[0x0000007f5c02ba60] - reason: EOF, error: 32770 (Tracker connection is closed by server)
[20190508 21:50:12.001] Got response from "config.resilio.com" - message: "{"relays": [{"addr": "66.206.5.74:3000","addr6": "[2604:4500:3:80::10]:3000"},{"addr": "66.206.5.74:3001","addr6": "[2604:4500:3:80::10]:3001"},{"addr": "66.165.255.194:3000","addr6": "[2604:4500:8:24a::10]:3000"},{"addr": "66.165.255.194:3001","addr6": "[2604:4500:8:24a::10]:3001"}],"trackers": [{"addr": "66.165.233.194:4000","addr6": "[2604:4500:9:58::10]:4000"},{"addr": "23.111.157.86:4000","addr6": "[2604:4500:5:245::10]:4000"}]}", error: 0 (<NULL>), http_code: 200
[20190508 21:50:13.779] CoreState: removed error - code: 11, message: "There's no connection to tracker"
I've verified that outgoing ports 4000, 3000, and 3001 are open.