diff --git a/amd/src/util/settings.js b/amd/src/util/settings.js
index b71e115..66e1416 100644
--- a/amd/src/util/settings.js
+++ b/amd/src/util/settings.js
@@ -5,7 +5,7 @@ import {call} from 'core/ajax';
 import notification from 'core/notification';
 
 // Prepare default value.
-let settingcache = null;
+let settingcache = {};
 
 /**
  * Retrieve settings.
diff --git a/classes/utilityservice.php b/classes/utilityservice.php
index b49a3d7..4d32c60 100644
--- a/classes/utilityservice.php
+++ b/classes/utilityservice.php
@@ -189,6 +189,7 @@ class utilityservice extends \external_api {
             "enablebadges" => new \external_value(PARAM_BOOL, 'Badges are enabled in this instance'),
             "badges_allowcoursebadges" => new \external_value(PARAM_BOOL, 'Course badges are enabled in this instance'),
             "showprevnextarrows" => new \external_value(PARAM_BOOL, 'Show arrows next to the student selector'),
+            "enableplansharing" => new \external_value(PARAM_BOOL, 'Show arrows next to the student selector'),
         ]);
     }
 
@@ -208,6 +209,7 @@ class utilityservice extends \external_api {
             "enablebadges" => !empty($CFG->enablebadges),
             "badges_allowcoursebadges" => !empty($CFG->badges_allowcoursebadges),
             "showprevnextarrows" => get_config("local_treestudyplan", "showprevnextarrows"),
+            "enableplansharing" => get_config("local_treestudyplan", "enableplansharing"),
         ];
     }