“Failed to fetch” when add a localhost server in Dgraph Ratel Dashboard

I was struggling for this for a while and then found out it actually related with browsers.

I succeed in

  • Chrome 92.0.4515.107
  • Firefox 92.0a1

and failed for

  • Brave 1.29.16
  • Safari 14.1.1

I guess Brave and Safari are expecting https.

Hope the info can save some people time in future. :grinning: