Not everyone is updating to the latest automatically... Some don't want, others still need to drive some league .. For example today its Torsdagsrace and so will be some other teams / leagues which do not want to update yet.
Everybody need to figure out for themselves what to do. Best is to update and use the old 6B executable to connect to 6B servers.
I provide the old 6B one more time for the people who forgot to make a backup. See attachment or download here; http://www.cargame.nl/forum/download/LFS06B.zip
Add it in your LFS directory otherwise you get an error