Panel does not display

I have a FreePBX installation on Debian.
Everything has been working OK for few weeks but now when I want to display the Operator Panel i click on the “Panel” tab which links to, the browser then displays “Waiting from” instead of which is the address of the PBX and time-out.
Does anyone know why and how to change this wrong address?

change your amportal.conf on line AMPWEBADDRESS= to AMPWEBADDRESS=

Totally right !