Voicemail-only extension unavailable to outside lines

It seems as though since our update to 2.10.1.9, we’ve had a lot of weird quirky issues. One of the issues we discovered today is that some of our voicemail-only extensions are only accessible locally. If dialed from an outside line, we get the message “Sorry, you’re having a problem. Goodbye.” It isn’t set up with a DID, so if you were to call, you’d dial our main office number and then punch in the extension when our pre-recorded message comes up.

Any idea what could be wrong?

Thanks.

Can you provide some info on your system versions and how it was installed?

Console output of a call that is failing is also useful.