Active Agent Fails

[badcompany]

I get this error when I try to connect an active agent to the server:

71:20191214:010822.374 zbx_setproctitle() title:'listener #3 [waiting for connection]'
72:20191214:010822.381 sending [{"request":"active checks","host":"some.server.com"}]
72:20191214:010822.381 before read
72:20191214:010822.547 got []
72:20191214:010822.547 In parse_list_of_checks()
72:20191214:010822.547 cannot parse list of active checks:
72:20191214:010822.547 End of parse_list_of_checks():FAIL
72:20191214:010822.547 End of refresh_active_checks():SUCCEED

but it never shows up in the server

[1berto]

Have you configured self/auto registration on the Server?

https://www.zabbix.com/documentation/3.0/manual/discovery/auto_registration