I try run command: app/console cache:clear

This return me error:

An error occurred when executing the "'cache:clear --no-warmup'" command:
PHP Fatal error: Uncaught Symfony\Component\Debug\Exception\FatalThrowable
Error: Fatal error: Class 'DOMDocument' not found in /var/www/html/vendor/s

Ubuntu 14.04 LTS I use PHP 7 and install php5-dom not resolved my problem: sudo apt-get install php5-dom


Warm tip !!!

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