Warning:  require(/apache$root/htdocs/vamp/vendor/composer/ClassLoader.php): Failed to open stream: not enough core in /apache$root/htdocs/vamp/vendor/composer/autoload_real.php on line 12

Fatal error:  Uncaught Error: Failed opening required '/apache$root/htdocs/vamp/vendor/composer/ClassLoader.php' (include_path='.:/php_root/000000') in /apache$root/htdocs/vamp/vendor/composer/autoload_real.php:12
Stack trace:
#0 /apache$root/htdocs/vamp/vendor/composer/autoload_real.php(26): ComposerAutoloaderIniteb658f95a4047347f31406a96a021c80::loadClassLoader('Composer\\Autolo...')
#1 /apache$root/htdocs/vamp/vendor/autoload.php(25): ComposerAutoloaderIniteb658f95a4047347f31406a96a021c80::getLoader()
#2 /apache$root/htdocs/vamp/includes/startup.php(83): require('/apache$root/ht...')
#3 /apache$root/htdocs/vamp/common.php(23): require('/apache$root/ht...')
#4 /apache$root/htdocs/vamp/viewtopic.php(20): include('/apache$root/ht...')
#5 {main}
  thrown in /apache$root/htdocs/vamp/vendor/composer/autoload_real.php on line 12