I've looked at the log files of 2 games : finals_2019_07_7 and finals_2019_07_16
In both games your broker logs in at the start of the game.
The server provides a key and prefix (authentication for the game).
After that, your broker doesn't submit any offers.
It also doesn't retrieve the server messages.
This prompts the server to define your broker as unresponsive,
and disconnects it from the game.
There's not more i can analyze from here, you should check the log files at your end.