The current pre-release of the client ("pioneer" in the version) is only compatible to itself. So you can only play with other testers. Please be aware!
@magge said in Solutions for common errors with the FAF client launcher or supreme commander:
Reason:
Client can not detect that you are logged in from browser
Change default web browser.
In addition to that, looks like to me, you have just an unstable connection as well when you have disconnects all the time.