Twilio notification setup error

[twistedstream]

Hey guys, I'm trying to set up Twilio notifications with the AD webapp. When I complete the setup and click the "Save & Test" button, I get this error flashed at the top of the page:

Error sending test notification: 'module' object has no attribute 'TwilioRestException'

I created a gh issue for this as it appears to be coming from code that's been around for over 4 years, which is odd because you'd think it would have been broken since then. But I'm curious if anyone on the forums have had issues recently trying to get Twilio notifications working.