Suddenly, zabbix can write its logs to some LogFile=/var/log/zabbix/zabbix_server.log , as well as control the level of information in the output of logs DebugLevel=3 .Put the 4th or 5th level and see the logs, you may find the answer. - de_frag
can't find a list of active checks to 176.17.122.19: host [ws1_cl4] not found - Egor
zabbixcan write its logs to someLogFile=/var/log/zabbix/zabbix_server.log, as well as control the level of information in the output of logsDebugLevel=3. Put the 4th or 5th level and see the logs, you may find the answer. - de_frag