This issue is caused due to the server update on our end. If you find your device is suddenly locked, please connect the device to any internet. After that, your device will be unlocked automatically.
If still unable to unlock the device, please submit a request here. In your request, please let us know:
-Your order number or a screenshot for proof of purchase
-A picture of the device (includes MAC number)
-The serial number of the device (located at the back of the device).
Once receiving your info, we will info our tech team to unlock the device for you.