Symfony错误 - 我不知道它意味着什么

I am new to Symfony and I am getting this error and I don't really know what it means.If anyone can help it would be greatly appreciated.

Screenshot of the error

Check your sql settings in the file /app/config/parameters.yml

Personnaly I doubt your DB port is '8888'.

Try to access the url http:///localhost:8888/web/app_dev.php/check.php and check if it's all green.

Hope it may helps you.