FAIL TO RUN PERFORMANCE TEST

Dear support,

I'm not using a local website, and the server ports are all working fine, but still fail to return the test result, don't know why.

I also ran the test on https://premium.wpmudev.org/hub/my-websites/
returns error message: DNS error while resolving i-buddha.com. Check the spelling of the host, and ensure that the page is accessible from the public Internet. -- My site is accessage from public internet

Regards,
SP