I'm getting the following error when I'm trying to enable Gzip Compression on my site:
Gzip is not working properly: - Your server may not have the "deflate" module enabled (mod_deflate for Apache, ngx_http_gzip_module for NGINX). - Contact your host. If deflate is enabled, ask why all .htaccess or nginx.conf compression rules are not being applied. If re-checking and restarting does not resolve, please check with your host or open a support ticket with us.
Deflate module is enabled on my server. I also checked zlib.output_compression. I don't have any server-side caching.