Cannot start Logstash

[Kernel Panic]

FreeBSD 12.1
Logstash 6.8.6

Hello all I've built Logstash from ports and starting it via rc.conf or
'service logstash start' does not work - it seems to start for a few
seconds then crashes, it doesn't even generate a log file in
/var/log/logstash/

I *can* start it when I run the following command as root:

/usr/local/logstash/bin/logstash -f /usr/local/etc/logstash/logstash.conf

Another unusual problem I've noticed is when I run the command to update
the plugins:

/usr/local/logstash/bin/logstash-plugin update

..generates the following error messages:

Error ArgumentError, retrying 1/10
could not find a temporary directory
Error ArgumentError, retrying 2/10
could not find a temporary directory
Error ArgumentError, retrying 3/10
could not find a temporary directory
Error ArgumentError, retrying 4/10
could not find a temporary directory
Error ArgumentError, retrying 5/10
could not find a temporary directory
Error ArgumentError, retrying 6/10
could not find a temporary directory
Error ArgumentError, retrying 7/10
could not find a temporary directory
Error ArgumentError, retrying 8/10
could not find a temporary directory
Error ArgumentError, retrying 9/10
could not find a temporary directory
Error ArgumentError, retrying 10/10
could not find a temporary directory
Too many retries, aborting, caused by ArgumentError
ERROR: Updated Aborted, message: could not find a temporary directory

Thanks for any assistance.