NGINX：connect（）到unix：/var/run/php7.0-fpm.sock失败（2：没有这样的文件或目录）

I'm trying to follow this Ansible tutorial while adjusting it for Ubuntu 16.04 with php7. Below this message you'll find my Ansible file. After running it and trying to visit the page in the browser I get a 404, and the following in the nginx error logs: whil