Failed to start tailwatchd.
Unit tailwatchd.service entered failed state.
tailwatchd has failed. Contact your system administrator if the service does not automagically recover.
This can often occur when multiple instances of tailwatchd are running. Perform the following via SSH:
ps aux | grep tailwatchd
kill -9 #
Where # will be all the processes listed. Once the processes are all killed perform:
/bin/systemctl restart tailwatchd.service
service tailwatchd restart