Warning: require(C:\webserver\Apache24\htdocs\11\public/../vendor/autoload.php): failed to open stream: No such file or directory in C:\webserver\Apache24\htdocs\11\public\index.php on line 24

Fatal error: require(): Failed opening required 'C:\webserver\Apache24\htdocs\11\public/../vendor/autoload.php' (include_path='.;C:\php\pear') in C:\webserver\Apache24\htdocs\11\public\index.php on line 24