diff --git a/app/Http/Controllers/Client/RegSysClientController.php b/app/Http/Controllers/Client/RegSysClientController.php
index 5ad585f..21692b9 100644
--- a/app/Http/Controllers/Client/RegSysClientController.php
+++ b/app/Http/Controllers/Client/RegSysClientController.php
@@ -103,7 +103,13 @@ public static function getSingleReg(string|null $reg_id): mixed
         ]);
 
         if ($response->ok()) {
-            return $response->json('result')[0];
+            if (!empty($response->json('result'))) {
+                return $response->json('result')[0];
+            } else {
+                // If reg ID is invalid, regsys returns HTTP 200 but an empty array.
+                self::logError("Registration with id " . $reg_id . " could not be retrieved, reg id invalid.");
+                return null;
+            }
         } else {
             self::logError("Registration with id " . $reg_id . " could not be retrieved, reason: " . $response->reason());
             return null;
diff --git a/app/Models/Application.php b/app/Models/Application.php
index 83caf88..467af42 100644
--- a/app/Models/Application.php
+++ b/app/Models/Application.php
@@ -312,6 +312,7 @@ public static function getAllApplicationsForExport()
                 'applications.id AS app_id',
                 'users.name AS user_name',
                 'users.email AS email',
+                'users.reg_id AS reg_id',
                 'type AS app_type',
                 'parent',
                 'display_name',