Warning: require(/volume1/web/wp-includes/version.php): failed to open stream: No such file or directory in /volume1/web/wp-settings.php on line 33

Call Stack:
    0.0001     360112   1. {main}() /volume1/web/index.php:0
    0.0001     360392   2. require('/volume1/web/wp-blog-header.php') /volume1/web/index.php:17
    0.0001     360776   3. require_once('/volume1/web/wp-load.php') /volume1/web/wp-blog-header.php:13
    0.0002     361488   4. require_once('/volume1/web/wp-config.php') /volume1/web/wp-load.php:37
    0.0002     362864   5. require_once('/volume1/web/wp-settings.php') /volume1/web/wp-config.php:115


Fatal error: require(): Failed opening required '/volume1/web/wp-includes/version.php' (include_path='.:/usr/share/pear') in /volume1/web/wp-settings.php on line 33

Call Stack:
    0.0001     360112   1. {main}() /volume1/web/index.php:0
    0.0001     360392   2. require('/volume1/web/wp-blog-header.php') /volume1/web/index.php:17
    0.0001     360776   3. require_once('/volume1/web/wp-load.php') /volume1/web/wp-blog-header.php:13
    0.0002     361488   4. require_once('/volume1/web/wp-config.php') /volume1/web/wp-load.php:37
    0.0002     362864   5. require_once('/volume1/web/wp-settings.php') /volume1/web/wp-config.php:115