Warning: require(/customers/0/3/3/basisschoolstene.be/httpd.www/vendor/composer/ClassLoader.php): Failed to open stream: No such file or directory in /customers/0/3/3/basisschoolstene.be/httpd.www/vendor/composer/autoload_real.php on line 12

Fatal error: Uncaught Error: Failed opening required '/customers/0/3/3/basisschoolstene.be/httpd.www/vendor/composer/ClassLoader.php' (include_path='.:/usr/share/php') in /customers/0/3/3/basisschoolstene.be/httpd.www/vendor/composer/autoload_real.php:12
Stack trace:
#0 /customers/0/3/3/basisschoolstene.be/httpd.www/vendor/composer/autoload_real.php(26): ComposerAutoloaderInit42b4cc7a0455abb41b05ab1ce118dee0::loadClassLoader('Composer\\Autolo...')
#1 /customers/0/3/3/basisschoolstene.be/httpd.www/vendor/autoload.php(7): ComposerAutoloaderInit42b4cc7a0455abb41b05ab1ce118dee0::getLoader()
#2 /customers/0/3/3/basisschoolstene.be/httpd.www/autoload.php(16): require('/customers/0/3/...')
#3 /customers/0/3/3/basisschoolstene.be/httpd.www/index.php(14): require_once('/customers/0/3/...')
#4 {main}
  thrown in /customers/0/3/3/basisschoolstene.be/httpd.www/vendor/composer/autoload_real.php on line 12