Edit File: Blackfire.php
<?php use Twig\Profiler\Dumper\BlackfireDumper; class_exists('Twig\Profiler\Dumper\BlackfireDumper'); @trigger_error(sprintf('Using the "Twig_Profiler_Dumper_Blackfire" class is deprecated since Twig version 2.7, use "Twig\Profiler\Dumper\BlackfireDumper" instead.'), E_USER_DEPRECATED); if (\false) { /** @deprecated since Twig 2.7, use "Twig\Profiler\Dumper\BlackfireDumper" instead */ class Twig_Profiler_Dumper_Blackfire extends BlackfireDumper { } }