EXP-1946: Adding a missing teleport failure message.

indra/newview/skins/default/xui/en/teleport_strings.xml

@@ -45,6 +45,9 @@ Go to 'Welcome Island Public' to repeat the tutorial.
 		<message name="no_inventory_host">
 			The inventory system is currently unavailable.
 		</message>
+    <message name="MustGetAgeRegion">
+      You must be age 18 or over to enter this region.
+    </message>
 	</message_set>
 	<message_set name="progress">
 		<message name="sending_dest">