I'm sorry about the issue. Please tap on the gear / wheel icon at the top of your kindle's screen, then tap on Sync option, etc.
; if needed, tap on the Wi-Fi (wireless) option and make sure it is connected to your Wi-Fi / wireless network name first.
; (If needed, swipe down from the top, then tap on gear icon or tap on Settings option (or option More), and continue.)
Please reply at the box below to continue troubleshooting. Thank you.