Trying to upload my dashboard as scheme v2 publicly

Hey guys,
I created a dashboard in Grafana Cloud, and wanted to upload it for public to Grafana dashboards | Grafana Labs
So whenever I click upload.. select a file.. click open - nothing happens.
File is not selected, submit button is grayed out, no errors, no errors in console.

What could be the problem?
I exported dashboard from Grafana cloud as v2 resource json for external instance.

It looks like like v2 resource json is not supported there at the moment. It works for me with classic model, but it doesn’t work with v2 model. V2 model is new, so it needs a time to have full support everywhere. I would recommend to use classic model for your (Zabbix :-)) dashboard(s) for now.

Thanks, that helped.
Nothing to do with Zabbix tho