How is SNMPv3 with USM auth and privacy configured on net-snmp 5.8 to avoid “security service 3 error parsing ScopedPDU”?

Question

I have a working net-snmp v5.7 install running on CentOS7, and I am now trying to do the same on net-snmp v5.8 running on CentOS8.

I have configured /etc/snmp/snmpd.c