ne0trace

Same here, script does not work with zabbix 3.x on Centos 6.8.

I installed zabbix-sender during my troubleshooting and it did not fix it

Same issue, if I run: "/var/lib/zabbix/bin/check_apache" I get this output: ZBX_NOTSUPPORTED

zabbix_sender and zabbix_get command both are available zabbix.x86_64 2.2.13-1.el6 @zabbix zabbix-agent.x86_64 2.2.13-1.el6 @zabbix zabbix-get.x86_64 2.2.13-1.el6 @zabbix zabbix-release.noarch 2.2-1.el6 installed zabbix-sender.x86_64 2.2.14-1.el6 @zabbix