Verification Failed

See the following Apple articles:

If you can't connect or sign in to iCloud -> If you can't connect or sign in to iCloud - Apple Support

Check the status of your network on Mac -> Check the status of your network on Mac - Apple Support

If your Mac isn't connecting to the internet over Wi-Fi

If your Mac isn't connecting to the internet over Wi-Fi - Apple Support

If you can't connect to the App Store, iTunes Store, or other Apple services

If you can't connect to the App Store, iTunes Store, or other Apple services - Apple Support

-> If you tried all of the above steps and you still can’t connect, contact Apple Support.

BTW:

You are sign in here .  .  .  with your Apple ID & Password.

Your Apple ID is the personal account you use with all Apple products and services. It includes the email address and password you use to sign in, as well as the contact, payment, and security details that you use with Apple.

You can’t merge multiple Apple ID accounts.

What happens when you use the same Apple ID & Password that you use to sign in here?

See -> Sign in with your Apple ID -> Sign in with your Apple ID - Apple Support

Please try again, see this Apple articles below:

Set up iCloud Drive ->Set up iCloud Drive - Apple Support                                                  

Set up iCloud Drive on all your devices -> Set up iCloud Drive on all your devices – Apple Support (UK)

Access and manage your files in iCloud Drive

Access and manage your files in iCloud Drive - Apple Support

Been there. Done that. No luck. Also, from preferences I can neither access iCloud nor set up Internet Connections. So, cannot set up email, either Google or iCloud.

Running El Capitan 10.11.6

Serial number - W8***91T

Thanks. Mike

[Personal Information Edited by Moderator]