Hummingbird not working

Hi there – the caching and gzip modules are not working stating the following:

Browser Caching is not working properly:

– Your server may not have the “expires” module enabled (mod_expires for Apache, ngx_http_headers_module for NGINX)

– Another plugin may be interfering with the configuration

If re-checking and restarting does not resolve, please check with your host or open a support ticket with us.

Also when I look at code view the minifications has also not worked.