Digium Addons issues, requires Asterisk 1.8.4+?

Please file a bug report. The function they use for version checking only understands 1.x versions so it will fail on 10,11,12,13 etc

http://git.freepbx.org/projects/FREEPBX/repos/digiumaddoninstaller/browse/functions.inc.php?at=release/2.11#321

			if (preg_match("/1\.[2468](\.[0-9][0-9]?(\.[0-9][0-9]?)?)?/", $full, $matches)) {