After event socket class was added it created a bug in FAX email and forward. It was unable to find the new EventSocket class adding the include resolves the problem.

resources/install/scripts/app/fax/resources/scripts/hangup_rx.lua

@@ -22,6 +22,9 @@
 --	Contributor(s):
 --		Mark J. Crane
 
+--set the debug options
+	debug["sql"] = false;
+
 --create the api object
 	api = freeswitch.API();