[Closed] Issues with Sync

I keep getting the following error when syncing:

calibre, version 2.74.0
ERROR: Error: Error communicating with device

Device closed the network connection

Traceback (most recent call last):
File "site-packages\calibre\gui2\device.py", line 88, in run
File "site-packages\calibre\gui2\device.py", line 536, in _sync_booklists
File "site-packages\calibre\devices\smart_device_app\driver.p y", line 51, in _synchronizer
File "site-packages\calibre\devices\smart_device_app\driver.p y", line 1402, in sync_booklists
File "site-packages\calibre\devices\smart_device_app\driver.p y", line 51, in _synchronizer
File "site-packages\calibre\devices\smart_device_app\driver.p y", line 623, in _call_client
ControlError: Device closed the network connection


Can anyone give me an idea of something to look at. The device Calibre Companion sits there with the screen saying asking Calibre what metadata it needs. The PC just says error communicating with the above error.