Not generating sitemap at all(

[wlf]

Please help!
Do not quite understand what happened. My site works now on Opencart platform, but Unlimited PHP Sitemap Generator doesn't work at all. Please see the screenshot.
What am I to do?

[XML-Sitemaps Support]

Hello,

probably there is a configuration problem - it looks like your server doesn't allow local network connections via port 80 (http) or 443 (https) - as a result sitemap generator is not able to crawl the site. This is usually related to firewall installed at the host - could you please contact your hosting support regarding this?

[wlf]

I'll try, thank you!