Have Recieved a replay From tp-link support:
Hello,
Thank you for contacting TP-Link support.
Just after the call, we received the notification that our cloud service has temporarily stopped working, and the relevant department is repairing it.
It will cause all the remote manage through the could service down during this period of time. So maybe this issue is affected by that.
Please wait for a moment and manage the device locally through the Web UI, our engineer will fix it as soon as possible.
Issue seems to be solved now.