Content-Type header [application/x-www-form-urlencoded] is not supported","status":406

Hi,

I am installing a fresh ELK stack, when I am trying to load dashboard using load.sh script, I am getting error:
Content-Type header [application/x-www-form-urlencoded] is not supported","status":406

My elastic search version is 6.0.0. Please help.

Thanks,
Ravi

Dashboards are loaded with the Beat's setup command. See loading dashboards.