Invalid discovery rule value: cannot parse as a valid JSON object: invalid object

[Frazou1]

Im trying to configure Mirth monitoring. I did all the documented tell and in my Zabbix server i got this:

Invalid discovery rule value: cannot parse as a valid JSON object: invalid object format, expected opening character '{' or '[' at: 'zabbix_get [12740]: Get value error: cannot read from socket: [0x00002745] An established connection was aborted by the software in your host machine..

Info:

Zabbix Agent 2 configure on 10051
Server 10051

Mirth Channel source 10050
Mirth.conf 10050

Also if i try that on the host the result appear :