If you are trying to open a website that is using https or http on your iPhone or iPad, you may receive the following error if you are on the latest iOS update. The error also happens either over Wi-Fi or your Cellular data network.
Safari cannot open the page because the network connection was lost.
You may be able to open the website fine on other iPhones or iPads devices that are using a different version of iOS. There seems to be a bug in the latest version of iOS and Safari that prevents the page from loading (it doesn’t matter if you are on WiFi or using your Cellular Data Network)
Deeper analysis using Safari Web Inspector on or Mac reveals the website we were trying to load on our iPhone isn’t really loading any of the page source itself. We are trying to communicate using https which should invoke an SSL certificate; however, none is loaded on the page. We see in the screenshot the elements on the page are the default iPhone error message.
If we change to http in our URL the site loads but there is nothing to display over http. The site not loading appears to be an issue on the site end and not your iPhone.