Zabbix Sender issue after upgrading to v3.4.1

[Sean35]

Hi, I appreciate you taking the time to read this.

Environment:

• Ubuntu 16.04.3 LTS
• Zabbix 3.4.1

After upgrading from v3 to v3.4.1 zabbix_sender doesn't seem to be working, the status is permanently "Not Supported".

We have an item of type: Zabbix Agent (active) / Numeric (unsigned)

Zabbix sender doesn't seem to work and gives no useful error, nothing in the Zabbix Server log:

# /usr/bin/zabbix_sender -vv -z 10.11.12.13 -s ZABBIX-SERVER -k zendesk.new.0min -o 82
zabbix_sender [13153]: DEBUG: answer [{"response":"success","info":"processed: 0; failed: 1; total: 1; seconds spent: 0.000049"}]
info from server: "processed: 0; failed: 1; total: 1; seconds spent: 0.000049"
sent: 1; skipped: 0; total: 1

I installed the zabbix_sender on another server and the result is the same.

-z is the IP of the Zabbix Server
-s This is the name of the host in Zabbix
-k is the name of the item key
-o is the value we're trying to send

Any thoughts?

Any additional info required to assist me?

Thanks!