Warning: require(vendor/autoload.php): Failed to open stream: No such file or directory in E:\htdocs\sites\development\webhooks\www\includes\PHPMailer\get_oauth_token.php on line 61

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