Why website domain subpage auto redirect to localhost IP

I can access my company website's main page. But when i click on any subpages, it show 127.0.0.1 refused to connect. The domain auto change it to localhost.

When I clicked on the https://ift.tt/3vF6XtX link, it redirect to https://ift.tt/3vCybRP.

This website has been deployed many years, but just happened this issue.