Warning: include(vendor/autoload.php): failed to open stream: No such file or directory in /home/realadvivf/v2.2/vendor/sabre/dav/examples/minimal.php on line 6

Warning: include(vendor/autoload.php): failed to open stream: No such file or directory in /home/realadvivf/v2.2/vendor/sabre/dav/examples/minimal.php on line 6

Warning: include(): Failed opening 'vendor/autoload.php' for inclusion (include_path='.:/usr/local/php7.1/lib/php') in /home/realadvivf/v2.2/vendor/sabre/dav/examples/minimal.php on line 6

Fatal error: Uncaught Error: Class 'Sabre\DAV\Server' not found in /home/realadvivf/v2.2/vendor/sabre/dav/examples/minimal.php:8 Stack trace: #0 {main} thrown in /home/realadvivf/v2.2/vendor/sabre/dav/examples/minimal.php on line 8