[WinError 10061] No connection could be made because the target machine actively refused it

[NetBoyy]

Installed Crosspoint 1.1.1 to the Xteink X4, and Crosspoint Reader plugin v0.1.1 in Calibre.

The device appears in Calibre just fine, but unfortunately when trying to Send to device, I get "Error communicating with device".

calibre, version 9.5.0
ERROR: Error: Error communicating with device

mkdir failed for Library in /: <urlopen error [WinError 10061] No connection could be made because the target machine actively refused it>

Traceback (most recent call last):
File "urllib\request.py", line 1321, in do_open
File "http\client.py", line 1358, in request
File "http\client.py", line 1404, in _send_request
File "http\client.py", line 1353, in endheaders
File "http\client.py", line 1113, in _send_output
File "http\client.py", line 1057, in send
File "http\client.py", line 1023, in connect
File "socket.py", line 870, in create_connection
File "socket.py", line 855, in create_connection
ConnectionRefusedError: [WinError 10061] No connection could be made because the target machine actively refused it

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "calibre_plugins.dummy1.driver", line 255, in _mkdir_on_device
File "urllib\request.py", line 187, in urlopen
File "urllib\request.py", line 487, in open
File "urllib\request.py", line 504, in _open
File "urllib\request.py", line 464, in _call_chain
File "urllib\request.py", line 1350, in http_open
File "urllib\request.py", line 1324, in do_open
urllib.error.URLError: <urlopen error [WinError 10061] No connection could be made because the target machine actively refused it>

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "calibre\gui2\device.py", line 110, in run
File "calibre\gui2\device.py", line 661, in _upload_books
File "calibre_plugins.dummy1.driver", line 309, in upload_books
File "calibre_plugins.dummy1.driver", line 272, in _ensure_dir
File "calibre_plugins.dummy1.driver", line 263, in _mkdir_on_device
calibre.devices.errors.ControlError: mkdir failed for Library in /: <urlopen error [WinError 10061] No connection could be made because the target machine actively refused it>