diff --git a/classes/class-PBS-LAAS-client.php b/classes/class-PBS-LAAS-client.php
index 543468e..38feb6e 100644
--- a/classes/class-PBS-LAAS-client.php
+++ b/classes/class-PBS-LAAS-client.php
@@ -385,7 +385,7 @@ private function retrieve_encrypted_tokeninfo() {
     }
   
     // decrypt encrypted tokeninfo
-    $decrypted = $this->decrypt($tokeninfo);
+    $decrypted = !empty($tokeninfo) ? $this->decrypt($tokeninfo) : false;
     if ($decrypted) {
       $tokeninfo = $decrypted;
     }