Additionally to a ZBX-17081 (libssh2), we have one more trouble with RHEL8.

Package "net-snmp-perl" has been removed as of RH8/CentOS8: https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html-single/considerations_in_adopting_rhel_8/index#removed-packages_changes-to-packages

The package is needed to collection of SNMP traps. Mentioned for example in this tutorial: https://blog.zabbix.com/snmp-traps-in-zabbix/

There is some unofficial replacement: https://centos.pkgs.org/8/okey-x86_64/net-snmp-perl-5.8-7.el8.2.x86_64.rpm.html 

I tried to manually download and install the RPM file, but it failed because of dependencies, which I could not resolve quickly and easily.

FUI: If configure /etc/snmp/snmptrapd.conf by adding zabbix perl trap handler and restart the daemon, it will start successfully, but in syslog you will get these messages:

Dec  8 13:59:37 centos8 systemd[1]: Starting Simple Network Management Protocol (SNMP) Trap Daemon.... 
Dec  8 13:59:37 centos8 snmptrapd[3585]: Can't open perl script "/usr/share/snmp/snmp_perl_trapd.pl": No such file or directory 
Dec  8 13:59:37 centos8 snmptrapd[3585]: embedded perl support failed to initialize (perl_parse(/usr/share/snmp/snmp_perl_trapd.pl) returned 2) 
Dec  8 13:59:37 centos8 snmptrapd[3585]: NET-SNMP version 5.8 
Dec  8 13:59:37 centos8 systemd[1]: Started Simple Network Management Protocol (SNMP) Trap Daemon.. 

Don't be confused by /usr/share/snmp/snmp_perl_trapd.pl path. This is attempt of initialization of perl engine, as we added own handler.

Solution should be found and documented.