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If I install NTOPNG and start the service my box immediately panics and reboots

Name   OPNsense.home.internal
Versions   OPNsense 20.1.4-amd64
FreeBSD 11.2-RELEASE-p18-HBSD
OpenSSL 1.1.1f 31 Mar 2020
Updates   Click to check for updates.
CPU Type   Intel(R) Xeon(R) CPU E5-2640 0 @ 2.50GHz (6 cores)
CPU usage   
Load average   1.00, 0.88, 0.70
Ram 12GB

What can I do to diagnose this?