Warning: require(vendor/autoload.php): failed to open stream: No such file or directory in /home/intagri/public_html/public_files/Correo/PHPMailer-master/get_oauth_token.php on line 18

Fatal error: require(): Failed opening required 'vendor/autoload.php' (include_path='.:/opt/cpanel/ea-php71/root/usr/share/pear') in /home/intagri/public_html/public_files/Correo/PHPMailer-master/get_oauth_token.php on line 18