Installation dependencies not met

Details

This topic applies to you only if you cloned the Magento 2 GitHub repository.

Errors similar to the following display when you run the Web Setup Wizard:

 Magento\Framework\Exception
 Command returned non-zero exit code:
`/usr/bin/php5 -f '/var/www/magento2/dev/shell/run_data_fixtures.php' -- --bootstrap='MAGE_DIRS[base][path]=/var/www/magento2' 2>&1`

[other errors]

Exception
 PHP Fatal error:  Class 'Magento\Framework\Stdlib\DateTime\TimezoneInterface' not found in /var/www/magento2/app/bootstrap.php on line 56

Dependencies not installed. Please run 'composer install' under /setup directory.

Whoops, it looks like setup tool dependencies are not installed.

`/usr/bin/php -f '/var/www/html/magento2/dev/shell/run_data_fixtures.php' -- --bootstrap='MAGE_DIRS[base][path]=/var/www/html/magento2' 2>&1`

 Exception
 PHP Fatal error:  Class 'Magento\Framework\Stdlib\DateTime\TimezoneInterface' not found in /var/www/html/magento2/app/bootstrap.php on line 56

Description

You must run composer install from both the <your Magento install dir> and <your Magento install dir>/setup directories before installer.

Suggestion

Run composer install from both of the preceding directories and try the installation again.