I have heard that some people aren’t able to get on to PCB after the survival update and it says downloading terrain then it crashed, I don’t know if it’s the server or the computer. I have to put it on forums as when we report it on the server no one listens.
I hope staff will help 
http://projectcitybuild.com/forums/index.php?topic=13025.0
1.10 issue thread. We are watching for issues, but so far, only a few select players are mentioning bugs. These bugs are (so far) user errors rather than server ones.
Yes Zezamik I had these problems a while ago and it was only sorted finally by updating my java and graphic drivers.
Therefore it does seem that this ‘downloading terrain’ and crashing or just not getting on is down to user error so get everything checked out for your launcher.
I updated the java but the drivers nope