Azure deployed Grafana Zabbix plugin

Currently trying to get the plugin for Zabbix to work with our Azure hosted Grafana.
Plugin is installed however when im entering the URL as a data source i get an error
*Post “https://Zabbix hosted IP/api_jsonrpc.php”: dial tcp Zabbix hosted IP and port: i/o timeout

I have tried with the name of the VM instead of IP - sometimes I get the same error but “behaving badly” at the end.

Currently Grafana is sitting on a Private link - I’ve added the details into the Zabbix’s host file.
Not quite sure if its something I’ve not setup correctly or plugin is at fault when hosted through Azure?