My name is***** am a certified professional with over 10 years experience. I will be glad to assist you with this.
I am sorry to hear that you are having this issue.
This sounds like it may have gotten deregistered, you will need to register the Kindle to your Amazon account again.
You can re-register your Kindle through the device itself. Go to the "Settings" menu, select "Register," and then enter your Amazon account email address and password ***** connect your device to your account. Let me know how it goes please.
were you able to register the kindle?