how often does the session expire?

[fifa2017player]

I am using a separate thread that calls keepalive every 60 seconds, but I find that after 30 minutes or so I still get the ExpiredSession error and have to login again.

[oczkers]

30 minutes of sending only keepalive? Try lowering 60 seconds to at most ~55s to avoid connection delays and randomize this to protect against bot haunting.