Warning: require_once(/var/www/vhosts/wk-turbo.com/webspace/httpdocs/dev.wk-turbo.com/system/startup.php): Failed to open stream: No such file or directory in /var/www/vhosts/wk-turbo.com/webspace/httpdocs/wk-turbo.com/index.php on line 18

Fatal error: Uncaught Error: Failed opening required '/var/www/vhosts/wk-turbo.com/webspace/httpdocs/dev.wk-turbo.com/system/startup.php' (include_path='.:/opt/alt/php81/usr/share/pear:/opt/alt/php81/usr/share/php:/usr/share/pear:/usr/share/php') in /var/www/vhosts/wk-turbo.com/webspace/httpdocs/wk-turbo.com/index.php:18
Stack trace:
#0 {main}
  thrown in /var/www/vhosts/wk-turbo.com/webspace/httpdocs/wk-turbo.com/index.php on line 18