A server with specified hostname could not be found

Hello, MRBFRFF.

Thank you for using Apple Support Communities.

Does this happen when connected to Wi-Fi?

Are you using any VPN networks? If so, does turning off the VPN resolve the issue.

When this happens are you trying to access certain content? For example Apple Music?

Try resetting your network settings: Settings > General > Reset > Reset Network Settings. Just keep in mind that this also resets Wi-Fi networks and passwords, cellular settings, and VPN and APN settings that you’ve used before.

Keep us updated.

Best regards.