Güncel Xenforo site yok hatasi

Merhabalar sitem bağlantı vermiyor hata neyden kaynaklıdır. Hata kodu.
[Thu May 28 20:52:19.410469 2020] [proxy_fcgi:error] [pid 10252:tid 139843161995008] [client 167.86.127.181:53078] AH01071: Got error 'PHP message: PHP Warning: require(/var/www/vhosts/forum.dymtlost.com/httpdocs/src/vendor/autoload.php): failed to open stream: No such file or directory in /var/www/vhosts/forum.dymtlost.com/httpdocs/src/XF.php on line 224\nPHP message: PHP Warning: require(/var/www/vhosts/forum.dymtlost.com/httpdocs/src/vendor/autoload.php): failed to open stream: No such file or directory in /var/www/vhosts/forum.dymtlost.com/httpdocs/src/XF.php on line 224\nPHP message: PHP Fatal error: require(): Failed opening required '/var/www/vhosts/forum.dymtlost.com/httpdocs/src/vendor/autoload.php' (include_path='.:/opt/plesk/php/7.2/share/pear') in /var/www/vhosts/forum.dymtlost.com/httpdocs/src/XF.php on line 224\n'