The only line in the browser console that seems relevant is this:

The resource from “http://192.168.10.170:8080/modules/mmm-zabbix-alerts//mmm-zabbix-alerts.js” was blocked due to MIME type (“text/html”) mismatch (X-Content-Type-Options: nosniff).

Here’s the config block (domain obscured):

               {
                        module: 'mmm-zabbix-alerts',
                        position: 'bottom_left',
                        header: 'Zabbix Alerts',
                        config: {
                                apiSearch: "http://zabbix.zzzz.net/api_jsonrpc.php",
                                zbx_user: "mirror", // after creating a user there u can $
                                zbx_pass: "mirror00", // user a password for the remote u$
                                listSize: 5,
                                triggerIds: [ "16753", "16031", "16196", "14251", "16289"$
                        }
                },

Any ideas what might be stopping it loading?

Thanks!