Fatal error: Uncaught Error: Failed opening required 'vendor/autoload.php' (include_path='.;C:\php\pear') in C:\Apache24\htdocs\PHPMailer-6.6.0\get_oauth_token.php:61 Stack trace: #0 {main} thrown in C:\Apache24\htdocs\PHPMailer-6.6.0\get_oauth_token.php on line 61