Problems with setup redis cache

Hello

During redis setup (–wpredis), EE install this redis object cache plugin
(https://wordpress.org/plugins/redis-cache/)

But on document https://easyengine.io/tutorials/wordpress/redis-wordpress-object-cache/
they suggested a different redis object cache plugin.

During installation it says Unable to locate package php5-redis

After that i follow this tutorial for redis_cache with conditional purging


here after installation when i check nginx -t && service nginx reload, it says

nginx: [emerg] duplicate location “/” in /etc/nginx/common/redis-php7.conf:20

I can’t able to load the nginx.

I couldn’t able to login to my dashboard due to nginx failed to load.

please someone help.