Add extra .

web/api/index.php

@@ -2,7 +2,7 @@
 use function Hestiacp\quoteshellarg\quoteshellarg;
 
 try {
-    require_once './inc/vendor/autoload.php';
+    require_once '../inc/vendor/autoload.php';
 } catch (Throwable $ex) {
     $errstr = 'Unable able to load required libraries. Please run v-add-sys-phpmailer in command line. Error: ' . $ex->getMessage();
     trigger_error($errstr);