This is happening to me now after almost every load. Beam to planet, beam to ship, transition to sector.
I'm just glad it doesn't seem to impact patrol/exploration missions (I log back into where I was supposed to be, assuming the load hadn't failed) but the fact that this is happening now when I've never experienced this before (along with the unable to Authenticate on the launcher), means that something has changed in yesterday's patch, not for the better.
Just had this same problem myself. It started after I changed my proxy settings. I was on the EU proxy, but kept getting the server disconnect when zoning, so set proxy to none. First attempt to zone and bang, got hit with this message.