我正在开发一个php7，symfony 3.0，elasticsearch 2.3.1和doctrine的项目。 当我想在我的终端在phpstorm中执行此命令时，我收到此错误。通常一切都应该正常。
robin@Robin:~/Documents/RoeselareVrijwilligt/VrijwilligersTool$ php bin/console fos:elastica:populate
11/11 [============================] 100%
Populating homestead/volunteerRefreshing homestead
PHP Fatal error: Call to a member function getRepository() on null in /home/robin/Documents/RoeselareVrijwilligt/VrijwilligersTool/vendor/friendsofsymfony/elastica-bundle/Doctrine/ORM/Provider.php on line 114
[Symfony\Component\Debug\Exception\FatalErrorException]
Error: Call to a member function getRepository() on null
fos:elastica:populate [--index [INDEX]] [--type [TYPE]] [--no-reset] [--offset OFFSET] [--sleep SLEEP] [--batch-size BATCH-SIZE] [--ignore-errors] [--no-overwrite-format] [-h|--help] [-q|--quiet] [-v|vv|vvv|--verbose] [-V|--version] [--ansi] [--no-ansi] [-n|--no-interaction] [-e|--env ENV] [--no-debug] [--] <command>