Looks like you are attempting to access the old mantis bug reporting system.

You should file a ticket here: (Submit a bug is on the right hand side of the screen.)

Daz3D Helpdesk and Bug reporting

"You just report the bug in a standard ticket. The is no special website for it anymore." - From Daz3D forum moderator in response to FireFox won't go to the bug report website. (March 13th 2016) on the official Daz Studio forums.