Website page speed

Hummingbird G Strip is not working properly.
The following message appears:

“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.”

I have contacted my host provider who stated that there were no issues with respect to the above.

Can you please advise on how to rectify same.

Kind Regards
John Hartnett