diff --git a/plugins/arElasticSearchPlugin/lib/arElasticSearchPlugin.class.php b/plugins/arElasticSearchPlugin/lib/arElasticSearchPlugin.class.php
index 5717dc0ceb..998468d76b 100644
--- a/plugins/arElasticSearchPlugin/lib/arElasticSearchPlugin.class.php
+++ b/plugins/arElasticSearchPlugin/lib/arElasticSearchPlugin.class.php
@@ -230,6 +230,10 @@ public function populate($options = [])
             $this->config['index']['configuration']['analysis']['char_filter']['diacritics_lowercase'] = $this->loadDiacriticsMappings();
         }
 
+        // Make sure it's initialized, QubitSearch::disable() gets an instance
+        // without initialization and it's used in the install/purgue tasks.
+        $this->initialize();
+
         $this->loadAndNormalizeMappings();
 
         // Display what types will be indexed