ERROR MESSAGE WHEN STOPPING/RESTARTING CAPTURE

edit

I receive the following error message when stopping the capture:

Error from extcap pipe: C:\Users\bill\AppData\Roaming\Wireshark\extcap\nrf_sniffer_ble.py:187: SyntaxWarning: invalid escape sequence '\s'
  "{validation=^\s*((37|38|39)\s*,\s*){0,2}(37|38|39){1}\s*$}{required=true}" % CTRL_ARG_ADVHOP)
C:\Users\bill\AppData\Roaming\Wireshark\extcap\nrf_sniffer_ble.py:716: SyntaxWarning: invalid escape sequence '\s'
  m = re.search("^\s*rssi\s*(>=?)\s*(-?[0-9]+)\s*$", capture_filter, re.IGNORECASE)

Also when restarting Capture:

Error from extcap pipe: C:\Users\bill\AppData\Roaming\Wireshark\extcap\nrf_sniffer_ble.py:187: SyntaxWarning: invalid escape sequence '\s'
  "{validation=^\s*((37|38|39)\s*,\s*){0,2}(37|38|39){1}\s*$}{required=true}" % CTRL_ARG_ADVHOP)
C:\Users\bill\AppData\Roaming\Wireshark\extcap\nrf_sniffer_ble.py:716: SyntaxWarning: invalid escape sequence '\s'
  m = re.search("^\s*rssi\s*(>=?)\s*(-?[0-9]+)\s*$", capture_filter, re.IGNORECASE)

Other info:

Version 4.2.3 (v4.2.3-0-ga15d7331476c).
Windows 10 on a notebook
Nordic Dongle nRF52840 set up for sniffing