sniffer_nrf52840dongle_nrf52840_4.1.0 won't connect to Wireshark

Question

I am trying to use blesniffer on wireshark. I have 2 nRF52840 dongles. 
 I have successfully captured traces using the 802.15.4 firmware on Wireshark with the dongle appearing as nrf Sniffer for 802.15.4 on Wireshark, but I cannot get the Dongle to appear as a nRF Sniffer for Bluetooth on Wireshark. Hopefully this proves all the python and wireshark installation is correct. 
 I can program the dongle in nRFconnect as a nRF52 Connectivity device, and see all the local BLE devices with this dongle. 
 It seems to program, but only appears as a USB serial port device in Windows, it doesn't list a capture device on wireshark. 
 Is there a more recent version of the dongle BLE Firmware which may address this issue?

George Redpath · Accepted Answer

I managed to resolve the issue by reinstalling pyserial in the correct location. What had happened was when I first updated the firmware I seemed to get a USB enumeration for the dongle. 
 But all working now.