Chances are snp itself was down or your zone file for it had issues. If it's the former, it'll generally be back up within a few minutes. If it's the latter, you can delete the file and repatch. A good way to check is to log in an alt located in some other zone and ask around.
It's also quite common to just crash out and have to try several times before you can get back to character select. It's just that buggy client.