https://emailtechsolutions.blogspot.com/2019/06/how-to-fix-icloud-connecting-to-server.html
One of the many problems iCloud users face on their iOS devices is they are unable to connect to the server. When they do something that requires connecting to iCloud, the device generates an error message that says "Verification Failed. There was an error connecting to the Apple ID server". In some cases, it also says "Unable to iCloud connecting to server".