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For Apple users, Safari is the browser of choice. Users adore it not only because it functions quickly, dependably, and smoothly, but also because it is the iPhone or iPad's default browser. But, the "Safari cannot connect to server" problem is a worrying occurrence you can run into while using the browser.
There are several potential causes for this error. We will explain why Safari couldn't connect to the server on your iPhone in the sections below, along with what you can do to quickly fix the issue.
Check Internet Connection
Use Correct Webpage URL
Reload Your Page
Clear Safari History and Data
Use IP Address
Modify DNS Settings
Reset Network Settings
Restart iPhone
Update Your iPhone
Also read - https://webneedy.com/fix-not-registered-on-network-error-on-android/