Fatal error: require_once(): Failed opening required '/vendor/autoload.php' (include_path='/var/www/vhosts/jagdverband.de/httpdocs/vendor/pear/archive_tar:/var/www/vhosts/jagdverband.de/httpdocs/vendor/pear/console_getopt:/var/www/vhosts/jagdverband.de/httpdocs/vendor/pear/pear-core-minimal/src:/var/www/vhosts/jagdverband.de/httpdocs/vendor/pear/pear_exception:.:/opt/plesk/php/7.3/share/pear') in /var/www/vhosts/jagdverband.de/httpdocs/web/modules/contrib/mailjet/mailjet.module on line 10