Every time this happens, I get confused and lost, and have to rediscover the solution. So here’s a note to future self.

Symptom: PHPStorm stalls on an SVN update, and sits there doing nothing. Network is OK. SSH into server that supplies SVN, watch the WebDAV logs, and there’s nothing even trying to talk to it.

PHPStorm is configured to use an external Subversion client.

Solution: Don’t (necessarily) go and mess around with the settings for PHPStorm. Open a terminal, go to the working set in question, and do an “svn up” from the command line. This is where you’ll discover that SVN has either identified the server certificate as expired or updated, and it’ll ask you to approve the certificate (in that latter case). Log in with your credential again. Now it’ll all be OK again.