gzip compression ability not detected

Hello,

I’m running nginx 1.8.0 with gzip compression enabled in my nginx.conf file, but the WP Performance Score Booster Settings page in my WP-admin backend states that “your web server does not support gzip compression”

Here is the text of my nginx configuration:

user www-data;
worker_processes 2;
pid /run/nginx.pid;

# Maximum open file descriptors per process;
# should be > worker_connections.
worker_rlimit_nofile 8192;

events {
	worker_connections 8000;
	# multi_accept on;
}

http {

	##
	# Basic Settings
	##

	sendfile on;
	tcp_nopush on;
	tcp_nodelay on;
	keepalive_timeout 35;
	types_hash_max_size 2048;
	server_tokens off;
	client_max_body_size 50M;
	server_names_hash_bucket_size 64;
	# server_name_in_redirect off;

	# Update charset_types due to updated mime.types
  	charset_types text/xml text/plain text/vnd.wap.wml application/x-javascript application/rss+xml text/css application/javascript application/json;

  	# Format to use in log files
  	log_format  main  '$remote_addr - $remote_user [$time_local] "$request" '
    	              '$status $body_bytes_sent "$http_referer" '
        	          '"$http_user_agent" "$http_x_forwarded_for"';

	include /etc/nginx/mime.types;
	default_type application/octet-stream;

	##
	# Logging Settings
	##

	access_log /var/log/nginx/access.log main;
	error_log /var/log/nginx/error.log warn;

	##
	# Gzip Settings
	##

	gzip on;
	gzip_disable "msie6";

	gzip_vary on;
	gzip_proxied any;
	gzip_comp_level 5;
	gzip_min_length 256;
	gzip_buffers 16 8k;
	gzip_http_version 1.1;

	gzip_types
    	application/atom+xml
    	application/javascript
    	application/json
    	application/ld+json
    	application/manifest+json
    	application/rdf+xml
    	application/rss+xml
    	application/schema+json
    	application/vnd.geo+json
    	application/vnd.ms-fontobject
    	application/x-font-ttf
    	application/x-javascript
    	application/x-web-app-manifest+json
    	application/xhtml+xml
    	application/xml
    	font/eot
    	font/opentype
    	image/bmp
    	image/svg+xml
    	image/vnd.microsoft.icon
    	image/x-icon
    	text/cache-manifest
    	text/css
    	text/javascript
    	text/plain
    	text/vcard
    	text/vnd.rim.location.xloc
    	text/vtt
    	text/x-component
    	text/x-cross-domain-policy
    	text/xml;
	# text/html is always compressed by HttpGzipModule

	##
	# nginx-naxsi config
	##
	# Uncomment it if you installed nginx-naxsi
	##

	#include /etc/nginx/naxsi_core.rules;

	##
	# nginx-passenger config
	##
	# Uncomment it if you installed nginx-passenger
	##

	#passenger_root /usr;
	#passenger_ruby /usr/bin/ruby;

	# Common upstream settings

	upstream php {
	# server unix:/run/php5-fpm.sock;
	# server unix:/var/run/hhvm/pid
	server 127.0.0.1:8000;
	# server 127.0.0.1:9000 backup;
	}

	upstream debug {
	# Debug Pool
	server 127.0.0.1:9001;
	}

	##
	# Virtual Host Configs
	##

	include /etc/nginx/conf.d/*.conf;
	include /etc/nginx/sites-enabled/*;
}

Thanks for any help anyone can provide!

https://ww.wp.xz.cn/plugins/wp-performance-score-booster/