HOR-4547: Array to convert string

workflow/engine/classes/Configurations.php

@@ -18,7 +18,7 @@ class Configurations // extends Configuration
      *
      * @return void
      */
-    public function Configurations()
+    public function __construct()
     {
         $this->Configuration = new Configuration();
     }

workflow/engine/classes/Derivation.php

@@ -1740,6 +1740,14 @@ class Derivation
         return $aGrp;
     }
 
+    /**
+     * Review the replaced by configuration
+     *
+     * @param string $user
+     *
+     * @return string
+     * @throws Exception
+    */
     function checkReplacedByUser($user)
     {
         if (is_string($user)) {
@@ -1747,8 +1755,8 @@ class Derivation
         } else {
             $userInstance = $user;
         }
-        if (! is_object( $userInstance )) {
-            throw new Exception( "The user with the UID '$user' doesn't exist." );
+        if (is_string($user)) {
+            throw new Exception("The user with the UID " . $user . " doesn't exist.");
         }
         if ($userInstance->getUsrStatus() == 'ACTIVE') {
             return $userInstance->getUsrUid();