Error while flashing board

[Rexsell]

Appears after python command

pi@ratos:~/klipper $ sudo python3 lib/canboot/flash_can.py -q
Resetting all bootloader node IDs...
Checking for canboot nodes...
ERROR:root:Can Flash Error
Traceback (most recent call last):
File "lib/canboot/flash_can.py", line 596, in main
loop.run_until_complete(sock.run_query(intf))
File "/usr/lib/python3.7/asyncio/base_events.py", line 584, in run_until_complete
return future.result()
File "lib/canboot/flash_can.py", line 488, in run_query
await self._query_uuids()
File "lib/canboot/flash_can.py", line 406, in _query_uuids
resp = await self.admin_node.readexactly(8, diff)
File "lib/canboot/flash_can.py", line 282, in readexactly
return await asyncio.wait_for(self._reader.readexactly(n), timeout)
File "/usr/lib/python3.7/asyncio/tasks.py", line 416, in wait_for
return fut.result()
File "/usr/lib/python3.7/asyncio/streams.py", line 677, in readexactly
raise IncompleteReadError(incomplete, n)
asyncio.streams.IncompleteReadError: 0 bytes read on a total of 8 expected bytes