Announcement Errors

Is everyone seeing this or is there something else I need to setup to make this work? Running Indigo 6.1 on 10.10.3 with Sonos plugin version 0.8.13, when I attempt announcements I get the following error:

Sonos Announcement: The Garage Door is Open, Volume: 40, Line-In:
Sonos Error Error in plugin execution ExecuteAction:

Traceback (most recent call last):
File "plugin.py", line 169, in actionZP_announcement
File "/Library/Application Support/Perceptive Automation/Indigo 6/Plugins/Sonos.indigoPlugin/Contents/Server Plugin/Sonos.py", line 1070, in actionAnnouncement
<type 'exceptions.ValueError'>: invalid literal for int() with base 10: ''

Did you fill in the dropdown for the line-in source that you want played in the announcement? It is near the bottom of the action dialog. I would check that first. Thanks.