Initial login Grafana 7.0.0 admin/admin not working

I am following this wiki to setup a pi zero wh ARMv6 on raspbian buster lite os.

Initially, I had downloaded the the wrong version of Grafana that lead to a nginx 502 bad gateway error. After learning the pi zero is ARMv6 and downloaded the corresponding Grafana release it fixed the 502 error.

But I am not able to access the Grafana dashboards at all, having tried admin/admin. And when I try pi / brewery it takes me to the main web app.