I have followed the instructions for sniffing ble packets with wireshark. Errors would occur when using 2.2.5 so I switched to the latest development version. See this question
Wireshark 2.3.0 starts correctly now when I press 'w' in the sniffer. However, it appears to capture packets but not display them. Is this a problem with wireshark 2.3.0 being incompatible with ble_sniffer or a configuration problem in wireshark?