Tried googling and found one other poster with the same issue.
2018-01-13 12:49:28.798 [ INFO] linuxdvb: adapter 0 setting exclusive flag
2018-01-13 12:49:28.799 [ INFO] dvr: Creating new configuration ''
2018-01-13 12:49:28.799 [ INFO] csa: Using SSE2 128bit parallel descrambling
2018-01-13 12:49:28.800 [ ERROR] caclient: wrong class caclient_dvbcam!
2018-01-13 12:49:28.800 [ ALERT] CRASH: Signal: 6 in PRG: ./tvheadend (4.2.5) [c6ef77fb587545d8b0c5e897f14fdf25d6ff8303] CWD: /home/dalton/devel/tvh423/tvheadend/build.linux